江苏省江阴市南菁中学2011-2012学年八年级5月作业检查试题(4科4份,答案不全)

资源下载
  1. 二一教育资源

江苏省江阴市南菁中学2011-2012学年八年级5月作业检查试题(4科4份,答案不全)

资源简介

2011—2012学年度第二学期作业检查
初二物理 2012年5月
一、选择题(每题2分,共24分)
1.用电线挂在天花板上的电灯,静止时受到的力是一对平衡力的是( )
A.天花板对电线的拉力和电线对天花板的拉力 B.电灯对电线的拉力和电线对电灯的拉力
C.电线对电灯的拉力和电灯受到的重力 D.电灯对电线的拉力和电灯受到的重力
2.下列实例中,为了减小摩擦的是 ( )
A.运动鞋底上有较深的花纹 B.拉杆旅行箱底部装有轮子
C.在冰雪路面上行车,需加装防滑链 D.体操运动员上单杠前往手上涂抹镁粉
3.如图所示,各物体的大小、形状、材料相同,重都为30N,施加的压力F=60N,垂直于物体表面。其中对支持面压力最大和最小的分别是 (  )
A.甲、乙    B.甲、丙     C.甲、丁     D.丙、丁
4.下列关于浮力的说法正确的是( )
A.物体浸没在水中越深,所受到的浮力越大
B.浸在液体里的物体受到的浮力总等于物体排开水的重力
C.铁块在水中下沉,表明铁块在水中不受到浮力的作用
D.地面上的铅球也受到浮力的作用
5.牛顿第一定律指出,惯性是物体的固有属性,一切物体都具有惯性。下图所示的四个物体中,惯性最大的是 ( )
6.有关运动和力的下列说法,正确的是 (  )
A、用吸管吸饮料时,嘴的“吸力”使饮料上升到口中
B、击打排球手感到疼是由于力的作用是相互的
C、投出去的篮球在惯性力的作用下在空中飞行
D、人沿水平方向推水平地面上的物体,没有推动,是因为推力小于摩擦力
7.如图示,烧瓶中的水正在沸腾,若往烧瓶中打气,会看到水停止沸腾,这是由
于 (  )
A.气压升高,水沸点升高    B.气压降低,水温升高
C.气压降低,水的沸点降低   D.气压升高,水的沸点降低
8.如图,张红同学用吸管吸饮料时出现了一个怪现象,无论她怎么用力,饮料都吸不上来。你认为出现这种现象的原因是( )
A.吸管有孔 B.大气压偏小 C.吸管太细 D.吸管插得太深
9.有一只量筒和一只量杯,量程均为100ml,它们50ml的刻度线的等高。现在分别放入质量相等的酒精,则酒精对量筒和量杯底部的压强:( )
A.量筒底部大 B.量杯底部大 C.一样大 D.条件不足,无法确定
10.底面积相等、质量相等的三个容器A、B、C,放在水平桌面上,如图所示,分别向三个容器倒入质量相等的水后,关于容器底部所受的水的压强和容器对桌面的压强,下列说法正确的是( )
A.三个容器底部所受的水的压强一样大,A容器对桌面的压强最大
B.A容器底部所受水的压强最大,三个容器对桌面的压强一样大
C.B容器底部所受水的压强最大,三个容器对桌面的压强一样大
D.C容器底部所受水的压强最大,三个容器对桌面的压强一样大
11.先在溢水杯中装满水(水面与溢水口齐平),然后放入一块重2N的木块,溢出的水全部用小烧杯接住则( )
A.溢水杯底部受到水的压强不变,小烧杯中水的重力大于2N
B.溢水杯底部受到水的压强不变,小烧杯中水的重力等于2N,
C.溢水杯底部受到水的压强减小,小烧杯中水的重力等于2N。
D.溢水杯底部受到水的压强增大,小烧杯中水的重力小于2N
12.在荡秋千的杂技表演中,当秋千荡到最高点时杂技演员甲和乙突然同时松手.如上图所示。那么杂技演员乙的落点位置是 ( )
A.O点 B.O点左侧 C.O点右侧 D.都有可能
二、填空题(每空1分,共35分)
1.现有一瓶某品牌的饮用纯净水。
⑴瓶中水的体积是550mL,则水的质量是________ g。
⑵瓶中水喝光后,从瓶口向外吸气,瓶子变瘪,是由于瓶子受到_________的作用。
⑶用手握住水瓶在空中静止不动,此时水瓶受到的重力和手对瓶的_________是平衡力。
2.许多瓶盖的外缘常有一些竖条纹,这样做是为了 ;用手握住瓶子,让瓶身保持竖直,如果增大握力,则瓶子受到的摩擦力 (选填“变大”“减小”“不变”)。
3.运输液体货物的汽车,液体上有气泡,如图所示,当汽车向右开动时,气泡将向
方向运动。
4.如图是水坝的截面图,水坝筑成下宽、上窄的形状,是考虑到水对坝体侧面有
________________,并且随深度的增加而________________。
5.钢笔一甩,钢笔水就被甩出,这是由于钢笔水具有______,吸钢笔水是利用
___________作用,把钢笔水压进笔胆里。
6.如右图所示,三个相同的烧杯放在同一水平桌面上,分别盛有盐水、
水和酒精,它们液面的高度相同,其中烧杯底受到液体压强最大的是
________________ (已知ρ盐水>ρ水>ρ酒精)
7.潜艇在水中受到的浮力的施力物体是_________,它的方向是________________。
8.小明同学用一个薄壁玻璃瓶、带色的水、两端开口的细玻璃管、橡皮塞自制了如图所示的气压计,并从管子上端吹入少量气体,使瓶内气压_______(大于/小于/等于)大气压,水沿玻璃管上升到瓶口以上.为了探究大气压与高度的关系,小明同学用双手捧着自制的气压计从我校新教学大楼的五楼跑到一楼,发现细玻璃管中的水面上升,于是他得出了“高度越低,大气压越小”的错误结论.请写出小明发生错误的原因:______________________.
9. 灰鹅飞行时,展开的翅膀上方的气压比下方小,使空气对翅膀的形成压力差,从而获得升力。 灰鹅在飞行途中突遇强风,艺高胆大的灰鹅做出了令人吃惊的动作--以飞行方向为轴线,横向转体180度,但最难的是--它的头部依然保持着正常飞行时的姿态!灰鹅转体是为了迅速________________(选填“升高”或“降低”)飞行高度,躲避危险,其用到的物理学原理是_______________________________
10.如图所示,用F=6N的水平向右的拉力匀速拉动物块A时,物块B静止不动, 此时弹簧测力计的示数为4N,则物块B所受摩擦力大小为__________N,摩擦力的方向向____________。
11.把烧瓶中的水加热至沸腾,用橡皮塞塞紧瓶口,倒置瓶口,热水停止了沸腾,然后用冷水浇瓶底,如图,则会看到______________,原因是___________________。生活中的________运用的原理刚好与其相反。
12.如图所示,是喷雾器的原理示意图,当空气从小孔迅速流出时,小孔附近空气的流
速较大,压强__________,容器里液面上方的空气压强_____________,液体就沿
着细管上升,从管口流出后,受气流的冲击,被喷成雾状.
13.小红的妈妈在超市买了很多食品,她用塑料袋提着回家,没走多远就感到手被得很痛.请你用学过的物理知识,给她提一个建议:在塑料袋提手处垫上一层厚纸(合理即可),这是利用改变__________ 来__________(“增大”或“减小”)袋子对手的压强.
14.一个重1N的物体,挂在弹簧测力计上,当物体浸没在水中时,弹簧测力计的示数是0.8N,物体受到的浮力大小为______N,将物体浸没在煤油中,它受到的浮力将______(填“变大”、“变小”或“不变”).
15.图中的水平桌面足够长,不计托盘质量和滑轮与绳的摩擦.物体A重10N,当物体B重为2N时,物体A保持静止,这时A物体受到的摩擦力为_____N;当物体B重为3N时,物体A向右做匀速直线运动,运动一段时间托盘着地,此后物体A做________运动,受到的摩擦力是_____N.
16.科学研究表明:空气对运动物体的阻力与物体速度的大小有关,物体速度越大,其受到的空气阻力越大。若不考虑雨滴质量的变化和风速的影响,雨滴由云层向地面下落的过程中,其运动情况是先做________运动,后做________运动.(选填“加速”、“减速”或“匀速”)
三、解答题(9分+25分7分)
1.图是地球表面附近的一些物体,请画出飞机所受重力的示意图。
2.图中为一圆球在墙边处于静止状态,请你用力的示意图表示出圆球所受到的力。
3. 如图所示,一装有水的试管斜放在水平桌面上,一木球正由底部沿试管壁上浮,请你用力的示意图画出木球所受的浮力(不考虑水的阻力影响).
4.如图所示,A是木块,B是长木板,C是弹簧测力计,另有砝码、棉布、毛巾等物。
(1)小芳在做“探究影响滑动摩擦力大小因素”的实验时,应拉动弹簧测力计使木块作_______运动.
(2)该装置相对图甲所示装置具有两点优势,其一是弹簧测力计读数较稳定,方便准确读数。另一点优势是:_____________________________________________________ 。
(3)小双实验组四位同学想利用图乙的方案来探究长木板面与课本间滑动摩擦力的大小与压力的关系。
①将一个同学的物理课本代替木块A放在水平木板上,通过弹簧测力计水平匀速拉动课本,此时弹簧测力计的示数是2N,课本与木板面间的摩擦力大小为_______N。
②在原来的课本上又放了另一个同学同样的课本,以改变课本与木板间的压力,这种方法:_________(选填“可行”或“不可行”)。
③通过多次实验,她们得到下表所示的实验数据:
分析表格中数据可以得出结论:当接触面的粗糙程度一定时,_________越大,________就越大。
5.以下是小彭同学在探究压力的作用效果时的部分图片。
(1)比较甲、乙两图可知:________________________________。
(2)小彭将质量分布均匀的物体B沿竖直方向切成大小不同的两块,如图丙所示,将左边部分移开后,发现剩余部分B‘对泡沫的压力效果没有变化,如图丁所示,这是因为压力的作用效果是由_______和_______共同决定的。
6.图是老师在演示液体内部压强情况的六幅图,除②图杯中装的浓盐水外,其余杯里装的都是水。请你仔细观察这六幅图后回答:
(1)比较①②两幅图,可以得出:液体内部压强大小跟液体的_______有关;
(2)比较⑤⑥两幅图,可以得出:液体内部压强大小还跟液体的_______有关;
(3)比较③④⑤三幅图,你还可以得出什么结论?__________________________________________
7.测定大气压实验中,因缺少大量程弹簧测力计,小明设计并进行了如下的实验:
①将蘸水的塑料挂钩吸盘按压在光滑水平的玻璃板上,挤出塑料吸盘内的空
气,测出吸盘的直径为d 。
②将装有适量细砂的小桶轻轻地挂在吸盘的塑料挂钩上;
③用小勺轻轻地向小桶内加沙,直到塑料吸盘刚好脱离玻璃板,用天平测出这
时小桶和沙的质量为m ,请完成下列问题:
(1)吸盘脱离玻璃板时,若不计塑料挂钩的质量,空气对塑料吸盘的压力大小是:____________,测得大气压数值的表达式是:p =__________________。
(2)实验中产生误差的主要原因是(写出一条即可)________________________ 。
8.小明探究“浮力大小与深度的关系”,探究过程及有关数据如图所示。
(1)物体(圆柱体)所受的重力是_____ N。
(2) 物体受到的最大浮力是_____ N。
(3)图乙中正确反映弹簧测力计示数F和物体下表面在水中的深度h关系的图象是_____。(物体未接触容器底)
(4)图甲的弹簧测力计_____(选填“能”或“不能”)用来测量一个大西瓜的重力。
9.流量表示单位时间内通过某一横截面的流体的体积,用字母Q表示。流量在生产和生活中有广泛的应用,如每到汛期,监测长江的流量是抗洪防汛的重要工作。
(1)如图甲所示,水流在粗细均匀的水平管道内向右匀速流动,设水流速度为v,管内通道的横截面积为S。取一段管道AB,水从B端流到A端所用时间为t,则AB间水柱的长度l = ______,
体积V =____________ (要求用S、v、t表示)。根据流量的定义 Q = V/t 可得 Q = v S,它表示流量等于流速与横截面积的乘积。
(2)打开水龙头,自来水通过导管流过如图乙所示的玻璃管。待水流稳定后,比较图中1、2两处的流速,画出C、D玻璃管中的水面大致高度,两液面的作图依据是______________________。
(3)利用流量 Q = v S,请你设计一个测量水龙头出水速度的实验方案。
①实验步骤与所测物理量:测出水龙头出水口的___________;打开水龙头,用容器接水并同时开始计时,测出经过一段时间t后容器内水的___________ 。
②出水速度的表达式___________。
10.下表是某种型号自行车的主要技术参数。该同学的质量是40Kg。求该同学骑车上学时:(g=10N/Kg)
(1)对地面的压强
自行车净重 120N
行驶过程中轮胎与地面总接触面积 1×10-2㎡
车轮直径 0.61m
轮胎承受的最大压强 1.4×105Pa
(2)自行车后座能携带物体的质量
2011—2012学年度第二学期作业检查
初二物理答卷 2012年5月
一 选择题(每题2分,共24分)
1 2 3 4 5 6 7 8 9 10 11 12
C B A D B B A A D D B A
二、填空题(每空1分,共35分)
1.__550__________ ____大气压________ _____摩擦力____
2.___增大摩擦力________ _____不变_______
3._____右______
4.___压强_____ _____增大_____
5._____惯性_____ 大气压强
6.___盐水_____
7.____水_____ ____竖直向上
8.____大于_____ 瓶内气体、液体吸收手上热量受热膨胀
9.____降低______ 流体流速越大,压强越小
10.___4___ 水平向右
11. 水重新沸腾 气压降低,液体沸点降低 高压锅
12.____较小 ____较大
13. 受力面积 减小
14.___0.2___ ____变小
15.____2____ ___减速 ____3____
16.___加速 ____匀速
三、解答题(6分+25分+10分)
4.(1)__水平匀速__
(2) A所受滑动摩擦力与B的运动速度无关
(3)①__2__ ②___可行 ③_____压力______ 滑动摩擦力
5. (1) 压力相同时,受力面积越小,压力的作用效果越明显
(2)___压力 受力面积
6. (1) 密度
(2) 深度
(3) 同种液体,同一深度,液体内部向各个方向压强相同
7. (1)___mg______
(2 未挤尽吸盘内空气
8. (1)_______4_________
(2)______0.8________
(3)______D_________
(4)_____不能________
9. (1)____vt_______ _____Svt________
(2) 流体流速越大,压强越小
(3)①____直径d ______体积V

10.略
第7题图
第8题图
第9题图
第12题图
第10题图
第3题图
第4题图
第6题图
第9题图
第11题图
第10题图
第8题图
第12题图
第15题图
第3题图
第2题图
第1题图
第4题图
第5题图
第6题图
第7题图
第8题图
第9题图

甲2011—2012学年度第二学期作业检查
初二英语 2012年5月
第一卷 选择题部分(65分)
一、听力测试(本大题共20分,每小题1分)
第一部分 听对话回答问题(共10小题)
本部分共有10道小题,每小题你将听到一段对话,每段对话听两遍。在听每段对话前,你将有5秒钟的时间阅读题目;听完后,你还有5秒钟的时间选择你认为最合适的备选答案。在听到“嘀”的信号后,进入下一小题。
Where are they going tonight
A. B. C.
What will the weather be like this afternoon
A. B. C.
What did the boy go in for at the sports meeting
A. B. C.
What are the two speakers talking about
A. B. C.
When can they go hiking together
A. This Saturday. B. Next Sunday. C. Next Saturday.
What can we learn about the man
A. He lost his dictionary last Sunday. B. He would come again for a new dictionary.
C. He thought the new dictionary was expensive.
What time will the meeting start
A. At 8:30. B. At 8:15. C. At 8:00.
Where does the dialogue take place
A. At the doctor’s. B. In the teachers’ office. C. At the cinema.
What is the girl’s idea about the uniform
A. Designing uniforms by themselves. B. Buying dark blue uniforms.
C. Wearing her own clothes.
How much does a one-way ticket cost
A. $320. B. $160. C. $230.
第二部分 听对话和短文答题(共10小题)
你将听到一段对话和两篇短文,各听两遍。听每段对话或短文前,你将有时间阅读相关小题,每小题5秒钟;听完后,每小题你仍有5秒钟的时间选择你认为最合适的备选答案。
听一段对话,回答第11,12 小题。答题完毕,请等待“嘀”的信号,进入第一篇短文。
What was Sophia like in middle school
A. Tall and pretty. B. Short and quiet. C. Tall and quiet.
What is the man interested in now
A. Swimming. B. Travelling. C. French.
听第一篇短文,回答第13至15小题。请根据短文内容,选择正确答案,完成信息记录表。答题完毕,请等待“嘀”的信号,进入下一篇短文。
Plan for summer vacation
Tom ·doesn’t want to stay at home·plans to go 13
David ·is going to visit Harbin·will stay there for 14 days
Alice ·will learn how to play the 15 ·wants to be a musician
A. fishing B. camping C. swimming
A. 5 B. 6 C. 7
A. guitar B. violin C. piano
听第二篇短文,回答第16至20小题。
16. Where will the fair be held
A. In America. B. In China. C. In Switzerland.
17. What are the opening hours of the fair
A. 9 a.m.-5 p.m. B. 8 a.m-6 p.m. C. 9 a.m-6 p.m.
18. What will be on show
A. Flowers, pictures and tools. B. Shoes, machines and tools.
C. Clocks, tools and machines.
19. Who can’t visit the fair
A. Xiao Ming, 17 years old. B. John Smith, 20 years old.
C. Kate Green, 33 years old.
20. How long will the fair last
A. Three days. B. Four days. C. Five day
二、单项选择 (本大题共14分,每小题1分)
21. You ________ to the meeting this afternoon if you have something important to do.
A. needn’t to come B. don’t need come
C. don’t need coming D. needn’t come
22. The math problem is _______ difficult that only _____ students can work it out.
A. too, a few B. so, a few
C. so, a little D. enough, little
23. It was too noisy _______ we couldn’t hear ______ he said at the meeting.
A. so, that B. so, what C. that, what D. for, that
24. The money you donated is used ________ people in need.
A. to help B. helped C. to helping D. for help
25. He used _______ on the right in Shanghai, but he soon got used ______ on the left in Hong Kong.
A. to drive, to drive B. to drive, driving
C. to driving, to drive D. to drive, to driving
26. Millie does such ______ many people are thankful to her.
A. an important job and B. important work and
C. an important job that D. an important work that
27. He knew ______ little French that he couldn’t make himself ______.
A. so, understand B. so, understood
C. such, understand D. such, understood
28._______ it is to go camping in ______ fine weather!
A. How great fun, so B. What great fun, such
C. How great fun, such D. What a great fun, so
29. This fashion show in our school was ______ that we heard ______ shouts.
A. so exciting, exciting B. so exciting, excited
C. such excited, excited D. such excited, exciting
30. ---Has Jack finished his homework yet
---I’ve no idea, but he ______ it the whole morning.
A. was doing B. did C. had done D. would do
31. -Is your father a teacher -Well, he _______.
A. used to B. was used to C. used to be D. is used to be
32. 70% of the earth _____ covered with water.
A. are B. is C. were D. being
33. He must be really grateful to you, ____________
A. doesn’t he B. mustn’t he C. needn’t he D. isn’t he
34. Somebody rang my doorbell just now, but I didn‘t know ________.
A. who were they B. who they were C. who was it D. who it was
三、完形填空 (本大题共10分,每小题1分)
These days, it is easier for us to travel to other countries than ever before. However, there is a big difficulty that most of us 35 when we meet people in other countries---- we cannot communicate with them. There are 36 where English is still not spoken, though it is the most widely known language. So, wouldn’t it be 37 if there was one language that could be understood by anyone anywhere in the world
Esperanto(世界语) that was created in 1887 may be the world’s 38 truly international language. In fact, although 39 artificial(人造的) languages have been already created, only Esperanto has had much success. Its learners say that it is about four times 40 to learn than other languages. Spelling and pronunciation are both easy, too. For example, it does not have silent 41 like the “h” in “honest”. If you 42 a word, you can spell it without any difficulty. The grammar is also as simple as possible: only sixteen basic 43 , no irregular verbs(不规则动词), only six verb endings.
In short, Esperanto should be attractive as a language to learn, 44 there is a problem: how many people have met anyone who can really speak it Anyway, we hope that some day one language can be mastered easily by anyone.
( )35. A. need B. miss C. face D. touch
( )36. A. offices B. schools C. cities D. places
( )37. A. safe B. nice C. funny D. difficult
( )38. A. first B. another C. last D. other
( )39. A. little B. a little C. few D. a few
( )40. A. better B. easier C. slower D. shorter
( )41. A. marks B. parts C. words D. letters
( )42. A. hear B. see C. watch D. notice
( )43. A. subjects B. sentences C. rules D. lessons
( )44. A. and B. but C. so D. because
四、 阅读理解 阅读下面的短文,然后根据短文内容选择最佳答案。(本大题共30分,每小题2分)
A
There was once a professor of medicine, who was very strict with his students. Whenever he took the chair on the exam committee(考试委员会),the students would be in fear, because he was seldom pleased with the answers they gave. A student would be lucky enough if he or she could receive a good mark from him. At the end of the term, the students of medicine would take their exam again. Now a student entered the exam room and got seated before the committee. This student was a little nervous as he knew it would not be so easy to get through the exam at all.
The professor began to ask. The student was required to describe a certain illness, his description of which turned to be OK. Then the professor asked about the cure (药剂) for illness, and the student, too, answered just as right.
“Good,” said the professor, “ and how much will you give the patient ”
“A full spoon”, answered the student.
“Now you may go out and wait for what you can get.”, said the professor. At the same time, the committee discussed carefully the answers the student had given. Suddenly the student noticed that there was something wrong with his last answer. “ A full spoon is too much,” he thought to himself. Anxiously he opened the door of the room and cried, “Mr. Professor, I’ve made a mistake! A full spoon is too much for a patient. He can take only five drops.”
“I’m sorry, sir.” Said the professor coldly, “But it’s too late. Your patient has died.”
45. The students were afraid of the professor because_______________
A. the often got angry and made him unhappy
B. their answers often shocked him
C. their answers seldom satisfied him
D. he often misunderstood them and gave them bad marks
46. Which of the following is NOT true according to this passage
A. The patient will be in danger if he’s taken as much as a full spoon.
B. The doctor will be in trouble if he has given the patient a full spoon.
C. Since one spoon is more than five drops, the patient will be all right soon after taking one spoon.
D. If the patient wants to stay safe, he should take no more than five drops at a time.
47. We can learn from this passage that ___________________.
A. the student passed the exam
B. the student didn’t pass the exam
C. the student was very happy with the result he would get
D. the professor was very pleased and gave him a good mark
B
No one wants to look silly or do the wrong thing at a new job. It is important to make the right impression(印象)from the very first day. You will face new people. You will be in a new place. It may be difficult to know what to do. Here are five tips to help you make it through the first day in a new job:
① First impression can last forever. Make sure you make a good one. Before your first day, find out if your new job has a dress code (rules about what you can wear to work). If so, be sure to follow it. No matter what, always be neat and clean.
② Get to work on time. Give yourself an extra 15 minutes to make sure you arrive on time.
③ Pay attention to introductions. You may be introduced to your workmates. They will be important to you. They are the ones who will answer your questions when the boss is not around.
④ Ask plenty of questions. Make sure that your supervisor has told you what is expected of you. If you are not told your duties, ask for a list. Set daily and weekly goals for yourself.
⑤ Never be the first one to leave. Watch what others do at the end of work hours. It does not look good for you to be eager(急切的) to leave.
48. What does the writer think you should do on your first-day work
A. We should dress in a right way.
B. We should learn how to introduce ourselves.
C. We should know our duties.
D. We should know our workmates well.
49. Which of the following statements is TRUE according to the passage
A. You should be the first one to arrive at work.
B. You should ask your workmates for your duties.
C. You should not be eager to go back home at the end of work hours.
D. You are required to arrive 15 minutes earlier.
50. From the passage, your supervisor is most likely your _______________.
A. visitor B. teacher C. workmate D. leader
C
A sunflower is a sunflower. A mobile phone is a mobile phone. But can you combine the two to do something for your local environment As early as next year it may well be possible. When you have finished with your mobile phone you will be able to bury (埋葬) it in the garden and wait for it to flower.
A biodegradable (生物可降解的) mobile phone was, this month, introduced by scientists. It is hoped that the new type of phone will encourage users to recycle. Scientists have come up with a new material over the last five years. It looks like any other plastic and can be hard or soft, and able to change shape. Overtime it can also break down into the soil without giving out any poisonous chemicals. British researchers used the new material to develop a phone cover that includes a sunflower seed (种子). When this new type of cover turns into waste, it forms nitrates (硝酸盐). These feed the seed and help the flower grow. Engineers have designed a small transparent (透明的) window to hold the seed. They have made sure it only grows when the phone is thrown away. “We’ve only put sunflower seeds into the cover so far. But we are working with scientists to find out which flowers would perform best. Maybe we could put roses in next time.” Said one scientist.
As phone technology is developing so quickly, people are constantly throwing their mobiles away. This means producers are under pressure (压力) to find ways of recycling them. Some 650 million mobile phones have been sold this year. Most of them will be thrown away within two years, adding plastic, heavy metal and chemical waste to the environment. A biodegradable cover can change this, according to the scientists.
51. After you have finished using the new type of mobile phone, _______.
A. the phone will do harm to the environment
B. the phone cover will break down easily in the soil you bury it
C. it will be recycled by the producers
D. it can be sent back to the shops.
52. The new type of phone can reduce the harm to the environment mainly ______.
A. because of the material of its cover
B. because of the sunflower seed
C. because it’s made of no poisonous chemicals
D. because you bury it in the soil after you finish with it
53. This type of research is done because ________.
A. the technology that produces mobile phones is changing quickly
B. users are constantly throwing their mobiles away.
C. nobody has ever thought of recycling mobile phones
D. producing mobile phones uses a lot of energy, so this has become a very big problem for the environment
D
As any homemaker who has tried to keep order at the dinner table knows, there is far more to a family meal than food. Sociologist (社会学家) Michael Lewis has been studying 50 families to find out just how much more.
Lewis and his co-workers carried out their study by videotaping(录像) the families while they ate ordinary meals in their own homes. They found that parents with small families talk actively with each other and their children. But as the number of children gets larger, conversation gives way to the parents’ efforts to control the loud noise they make. That can have an important effect on the children. “In general the more question-asking the parents do, the higher the children’s IQ scores,” Lewis says. “And the more children there are, the less question-asking there is.”
The study also provides an explanation for why middle children often seem to have a harder time in life than their brothers and sisters. Lewis found that in families with three or four children, dinner conversation(交谈) is likely to center on the oldest child, who has the most to talk about, and the youngest, who needs the most attention. “Middle children are invisible,” says Lewis. “When you see someone get up from the table and walk around during dinner, chances are it’s the middle child.” There is, however, one thing that stops all conversation and prevents anyone from having attention: “When the TV is on,” Lewis says, “dinner is a non-event.”
54. The writer’s purpose in writing the text is to _________.
A. show the relationship between parents and children
B. teach parents ways to keep order at the dinner table
C. report on the findings of a study
D. give information about family problems
55. Parents with large families ask fewer questions at dinner because ____________.
A. they are busy serving food to their children
B. they are busy keeping order at the dinner table
C. they have to pay more attention to younger children
D. they are tired out having prepared food for the whole family
56. By saying “Middle children are invisible” in paragraph 3, Lewis means that middle children _________.
A. have to help their parents to serve dinner
B. get the least attention from the family
C. are often kept away from the dinner table
D. find it hard to keep up with other children
57. Lewis’ research provides an answer to the question _________.
A. why TV is important in family life
B. why parents should keep good order
C. why children in small families seem to be quieter
D. why middle children seem to have more difficulties in life
第二卷 非选择题部分(40分)
一、词汇运用 (本大题共8分,每小题1分)
(A)根据句意,在标有题号的横线上,写出括号内所给单词的适当形式。
Our school is an excellent one. We’re ________________ of it. (pride)
The show _____________ by the students was successful. (organize)
The girl sang so _______________ that everyone became quite excited. (wonder)
People never look down on him because of his _______________ (ugly).
(B)根据句意和汉语注释,在标有题号的横线上,写出单词的正确形式。
5. His illness _________________(影响) his daily life and causes many problems.
6. As a student, you’ll be __________________(惩罚) if you don’t hand your homework in on time.
7. By ______ (训练) local doctors and nurses, we hope to help more people.
8. We often do some _______________(义务的) work to help charities.
1. 2. 3. 4.
5. 6. 7. 8.
二、动词填空 (本大题共8分,每小题1分)
Would you please tell Jack he _________________ on the phone (want)
He said he wouldn’t go to Ann’s birthday party unless he ______________ to. (invite)
There are many foreigners here but they are not used to _________________ chopsticks. (use)
That patient was too grateful to the doctor ________________ (say) a word.
To tell the truth, glass ______________ (feel) very cold in winter.
More actions ought to __________________(take)to prevent pollution.
There ________________ (be) little clean water for us to drink in the future, will there
People there must be really grateful to you since you ________________ (help) them so much. .
1. 2. 3. 4.
5. 6. 7. 8.
三、完成句子 (本大题共9分,每小题1.5分)
1. 我以前不习惯与别人合用一张课桌。
I ________________________________________________________a desk with others before.
2. 那个病人必须马上手术。
The patient ___________________________________________________________________.
3. 为了自己长大能出国深造,马林正努力存钱。
Ma Lin is trying his best to save his money ____________________________________________________ when he grows up.
4. 这房子太贵了,他根本买不起。
The house is __________________________________________________________________________.
5. 她来这家医院之前受过护士培训。
She _________________________________________________before coming to this hospital.
6. 全世界的人都应该善待动物。
Animals _________________________________________________________by people all over the world.
四、缺词填空 (本大题共5分,每小题0.5分)
As we know, many animals do not stay in one place. Birds, fishes and other animals m 1 from one place to another at a c_______2____ time. They do that for d 3 reasons: Most of them do that to find their food easily, but others want to get away from places that are too crowded.
When cold weather comes, many birds fly to the south, because it is warmer and e____4______to find food there. Some fishes give birth in warm water and come back to cold water to f 5 . In northern Europe, there is a kind of mouse. They leave their homes when they become too many. They move all the way to the seaside, and many of them are k 6 when they fall into the sea.
Recently, scientists have s 7 a kind of strange fish. Every year, when the season of bad weather a 8 , the fish get into a long line and walk a 9 the floor of the sea. Nobody knows why they do this, and nobody knows where they go.
So, sometimes we know why humans and animals go from one place to another. but at other times we don’t.. Maybe living things just like t 10 .
1. 2. 3. 4. 5.
6. 7. 8. 9. 10.
五、书面表达:(本大题共10分)
请根据要点完成短文,注意:短文须包括所有内容要点,不要逐句翻译,最后一点要求发挥写满2句,注意短文要连贯、通顺;词数80左右。
1. UNICEF 在1946年战后的欧洲成立。在那时候,孩子们的生活因为战争被改变了。
2. 现在UNECEF在161个国家和地区开展工作。它帮助政府和家庭使孩子们的世界更美好。
3. UNECEF相信所有的孩子应该获得干净的水和食物,以便于保持健康。他们应该去上学而不是赚钱养家。
4. UNECEF通过出售圣诞卡和组织其他集资活动筹集资金。人们可以通过做义工来帮助UNCEF。
5. 我认为UNECEF。。。
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
___________________________________________________________________________________________
初二作业检查答案
第一卷
听力
1-5 BBCAC 6-10 BCAAB 11-15 BCBAC 16-20 ACBAB
单选
21-25 DBBAD 26-30 CBBBA 31-34 CBDD
完形填空
35-39 CDBAD 40-44 BDACB
四.阅读理解 CCB ACD BAB C B B D
第二卷
一.词汇
1. proud 2. organized 3. wonderfully 4. ugliness
5. affects 6. punished 7. training 8. voluntary
二.动词填空
1. is wanted 2. was invited 3. using 4. to say
5. feels 6. be taken 7. will take 8. have helped
三.完成句子
1. 我以前不习惯与别人合用一张课桌。
I wasn’t used to sharing a desk with others before.
2. 那个病人必须马上手术。
The patient must be operated on at once.
3. 为了自己长大能出国深造,马林正努力存钱。
Ma Lin is trying his best to save his money so that he can go abroad for further study when he grows up.
4. 这房子太贵了,他根本买不起。
The house is so expensive that he can’t afford it.
5. 她来这家医院之前受过护士培训。
She was trained as a nurse before coming to this hospital.
6. 全世界的人都应该善待动物。
Animals should be treated with kindness by people all over the world.
四 缺词填空
1.move 2. certain 3. different 4.weather 5.easier 6.feed
7.leave 8.killed 9studied 10.arrives 11.across 12.travel(l)ing
书面表达(略)2011—2012学年度第二学期作业检查
初二语文 2012年5月
一、积累与运用。(15分)
1.下列各组词语中读音和书写有误的一项是( )(3分)
A.阔绰(chuò) 不屑置辩 簇(cù)拥
B.打折(zhé)了腿 作揖(yī) 不省(xǐng)人事
C.带挈(qiè) 腆(tiǎn)着肚子 星宿(xiù)
D.俯瞰(kàn) 扣人心弦(xián) 讳(huì)言
2.下列各句加点的成语使用有误的一句是( )(3分)
A.在这颗桃核上,刻着28个罗汉,个个栩栩如生, 真是巧夺天工。
B.新组建的这支足球队训练抓得很紧,但上场对垒到底如何,还不得而知,我们只好拭目以待。
C.北京十家大医院准备联合推出电话及网上预约挂号的消息不胫而走,两天内向有关方面问讯的人难以数计。
D.小明不仅认真学习,而且好为人师,班上的同学不管谁在学习上遇到困难,只要找到他,他都乐意帮助。
3.对下面文段中加点词的解释有错误的一项是( )(3分)
虽人有百手,手有百指,不能指其一端;人有百口,口有百舌,不能名其一处也。于是宾客无不变色离席,奋袖出臂,两股战战,几欲先走。
A.虽:虽然 B.名:说出
C.股:大腿 D.走:跑
4.下列句子中没有语病的一句是( )(2分)
A.刚发行的《祝福中国》是新中国成立以来第一套由少年儿童自己设计的。
B.经过三年的努力学习,她对自己能否考上理想的高中充满信心。
C.据统计,地球上的森林大约有三分之一左右被采伐或毁掉。
D.市敬老院在三月份接待了来自各行各业的爱心人士。
5.为下面一段话中画线处依次填入的一组句子,最恰当的一项是(2分) ( )
白日里浑然一片的泉鸣,此时却能分出许多层次, ,是草丛中淌过的小溪; ,是石缝间漏下的滴泉; ,应为万道细流汇于空谷;那雄浑如铜管齐鸣声,定是激流直下陡壁,飞瀑落入深潭。
① 那厚重如贝司轰响声 ②那柔曼如提琴声 ③那清脆的弹拨声
A.②①③ B.③②① C.②③① D.③①②
6.小彬的爷爷的三位朋友分别在今天过七十大寿、乔迁新居、分店开幕。如果爷爷委托你去送对联庆贺,下面三副对联该如何送才恰当呢?(2分) ( )
(甲)大启而宇,长发其祥
(乙) 三春草木如人意 万里河流似利源
  (丙)室有芝兰春自永,人如松柏岁长新
A.甲送乔迁新居者;乙送分店开幕者;丙送过七十大寿者
B.甲送分店开幕者;乙送乔迁新居者;丙送过七十大寿者
C.甲送过七十大寿者;乙送乔迁新居者;丙送分店开幕者
D.甲送过七十大寿者;乙送分店开幕者;丙送乔迁新居者
二、阅读与赏析。(49分)
(一)阅读下面的诗歌,回答问题。(3分)
春日即事 李弥逊 ①
   小雨丝丝欲网春,落花狼藉近黄昏。
   车尘不到张罗地②,宿鸟声中自掩门。
  [注]①李弥逊(1085-1153),字似之,吴县(今属江苏省苏州市)人,历任中书舍人、户部侍郎等职。因竭力反对秦桧的投降政策而被免职。②张罗地:指门可罗雀、十分冷落的地方。
7.首句中的“网”字用得可谓独具匠心,请简要赏析。(2分)
8.最后两句了表达了作者什么样的情感?(1分)
(二)阅读下面文言,回答问题。(12分)
商鞅事魏
鞅少好刑名之学,事魏相公叔痤为中庶子。公叔痤知其贤,未及进。会痤病,魏惠王亲往问病,曰:“公叔病有如不可讳,将奈社稷何?”公叔曰:“痤之中庶子公孙鞅①,年虽少,有奇才,愿王举国而听之!”王嘿然。王且去,痤屏人言曰:“王即不听用鞅,必杀之,无令出境。”王许诺而去。公孙痤召鞅谢曰:“今者王问可以为相者,我言若②,王色不许我。我方先君后臣,因谓王即勿用鞅,当杀之。王许我。汝可疾去矣,且见禽。”鞅曰:“彼王不能用君之言任臣,又安能用君之言杀臣乎?”卒不去。惠王既去,而谓左右曰:“公叔病甚,悲乎,欲令寡人以国听公孙鞅也,岂不悖哉!”
[注]①公孙鞅:商鞅本姓公孙,事秦后因有战功,封商十五邑,号商君,因称商鞅。②若:你。
9.下列句中的“而”与“王许诺而去”中的“而”用法相同的一项是(3分)( )
A.中峨冠而多髯者 B.拔山倒树而来
C.学而不厌 D. 而计其长曾不盈寸
10.解释下列句子中加点的词(4分)
①会痤病 会: ②因谓王即勿用鞅 因:
③且见禽 禽: ④又安能用君之言杀臣乎 安:
11.翻译下列句子(3分)
(1)王色不许我。(1分)
(2)欲令寡人以国听公孙鞅也,岂不悖哉!(2分)
12.商鞅“卒不去”的原因是什么?(用原文回答)由此可见,他是一个怎样的人?(2分)
(三)阅读下面的说明文,回答问题。(6分)
空气中取水
①任何时候,大气中都含有105亿英亩呎①水,其总量是世界上所有江河水量的6 倍多。其中,大约2%很快就会作为降雨落到地面,剩余的98 %依然处于水蒸气的状态。
②有人提议,用声音从空气中获取水分。凉爽、宁静的夜晚,空气中的水分达到饱和后,即使是微小的空气振动,也能凝聚水分,产生雨滴。在中国云南省的山区,村民们有个传统,通过大声喊叫来祈雨。据说,喊得越响,雨下得越大。
③一个有趣的新想法看起来似乎可行。在临海的沙漠地区建造温室,用寒冷的海水作为空气调节器,从炎热的空气中凝聚水分。这种温室实际上是巨大的露水制造机。从2002 年以来,帕顿的阿布扎比温室已经在沙漠中种出了黄瓜、西红柿和鲜花。10 平方英尺的温室每天可产生10加仑水——这比热带雨林通过降雨得到的水还要多。
④在干旱的沙漠之中,人们曾尝试通过收集雾水解决用水问题。顺着智利北部阿塔卡马沙漠中绵延的山顶,悬挂着75 张大塑料帆网。这里已经连续几年没有降雨了,但寒冷的近海气流定期从太平洋上大量涌来,塑料帆网通过获取这些气流的水分而变得十分潮湿。每张帆网有40 英尺×10 英尺大小,一天能收集40 加仑水。那里的一个小镇,从前用水完全靠从50 英里外运来。如今这项工程平均每天可以给小镇提供3000 加仑水。
⑤这种做法被广为接受。南美洲的整个太平洋沿岸,很多社区已经建造了捕雾幕帐,用来给新栽的树木供水。这种系统一旦建立起来,这些树就可以在叶子上为自己收集雾气,在沙漠中重新创造以雾为基础的生态系统。
【注】 ① 英亩呎:体积单位。(选自《当江河枯竭的时候:21 世纪全球水危机》,有删改)
13.第①段中画线句子运用了哪些说明方法?有什么作用?(3分)
14.“空气中取水”的方法有哪几种,请根据文章内容加以概括。(3 分)
(四)阅读下面的文章,回答问题。(4分)
①英国史学家卡莱尔花了多年的心血,完成了《法国大革命史》的全部文稿,随后将它交给最信任的朋友米尔去完善。然而就在第二天,手稿被米尔家的女佣当作废纸丢进了火炉!
②可以想象卡莱尔当时的心情,抱怨吧,可抱怨又能解决什么问题呢?于是他很快平静下来,反而安慰悲伤的米尔:“没关系,就当我将作文交给老师批阅,老师说‘这篇不行,重写一次吧,你可以写得更好!’。”
③卡莱尔再起炉灶,重写这部巨著。他的第二稿,无论文字还是内涵,都达到了卡莱尔写作生涯的巅峰。
④这个故事告诉人们,当事情到了无可挽回的境地时,与其抱怨还不如改变。
⑤现实生活中,不如意的事十之八九,心情不好就抱怨天气,交通堵塞就抱怨社会,上课迟到就抱怨闹钟,工作太累就抱怨老板…… 于是抱怨变成了最方便的出气方式。但抱怨只是一种情绪发泄,无度地抱怨,不但不能缓解烦恼,反而放大了原来的痛苦,陷入满腹牢骚、抱怨不休的恶性循环之中,于事无补。
⑥如果你想抱怨,生活中的一切都会成为你抱怨的对象;如果你不抱怨,生活中的一切都不会让你抱怨。所以,不管现实怎样,我们都不应该抱怨,而要靠自己的力量来改变现状并获得幸福。
⑦当你决定抛开你的抱怨时,你将会发现人生变得比较顺利、有趣。把抱怨扫除,你就可以拥有创造力,获得聪明才智爆发的空间。
(选自《思维与智慧》,有删改)
15.本文表达的主要观点是: (2分)
16.文章①—③段讲述卡莱尔的故事有什么作用?(2分)
(五)阅读下面的文章,回答问题。(14分)
那一条紫花布帘
①一条紫花布帘把房间隔开,一边是客厅,一边是我的居室。紫色的花是蔷薇,每一束都有几朵,定格着从孕蕾到绽放的整个过程。一束一束以粉绿的底色连缀起来,构成一面柔软可飘动的墙壁。凝视它,放飞心绪,想像篱墙上横斜的枝条抑或夜色中浮动的暗香。
  ②掀起紫花布帘的一角,我的居室尽收眼底。床,桌子,小凳,书架把紫花布帘后的空间挤得满满的。北墙上有窗,窗外有树,阳光透过叶子的反射投进来,光线中沾染凝重的暗绿,从门透过来的光穿过布帘,采撷了花瓣的颜色,浅紫和暗绿在空气中交汇,融合,跳荡,漂浮,弥漫着……床铺温软,永远散发着清新的气息;桌凳光滑,泛着干净的微光;墙壁洁白,纤尘不染。妈妈无力为我拓展宽敞的居所就不厌其烦地打扮这一角,于是它显得饱满,温馨,宛如一朵蔷薇花苞,蓬动着幽香的生命之波。
③满满的书架收藏着唐朝的明月,宋朝的飞花、碧云天的春水,以及大写意的荷韵、大如席的燕山雪、轻捷如飞的鹰隼骏马、阳关三叠的朝雨轻尘,西方哲人严密的推理以及华夏歌者感性的修辞,还有洪荒的远古、扑朔神妙的未来。玻璃风铃垂在书架前,宛如凝固的露珠,生动敏感,不胜一缕细若游丝的风和轻微的触碰。环佩珠玉和小河淌水的声响是它的低语,绵延不绝。
④铮然有声的风铃下,我喜欢把玩外婆赠予的雕花手镯,它古朴的肌理和纹路一定凝结着哪位不知名的民间艺人对美的独到理解。爷爷留下的那本线装的《千家诗》是我的启蒙教材,很长一段时间,我带着手镯去读它,柔和的光晕闪动在泛黄的纸页上,我的神思便上溯到一个久远的年代……我久久地翻阅着,古旧的手镯和线装书慢慢有了目光的鲜活和血液的温度。我的身后,紫花布帘阻隔着别人的视线和脚步,没有人打扰我思绪的漫游。
  ⑤每一个暮春时节,青青的藤条都开出喇叭一样的小黄花。窗前的苦楝树老了,串串紫花却每每如期而至,花谢了要结许多果子,黄黄的,引来许多觅食的鸟儿,我常把面包屑撒在窗口,躲在帘后看它们啄食,这让我快乐。清晨如洗的鸟声,潮汐一样淹没我;冬天留守的多半是麻雀,这茶褐色的小精灵落在枝头,在我稚嫩的感叹里,很像空白的稿纸上写下的一首诗。
  ⑥十二岁生日那天,妈妈送我一本带锁的日记。成长过程中,妈妈一次又一次慷慨地给我舒张自己的机会,从此,日记记载了我爱做梦年纪里每一种美丽的心情,如同一盒精心收藏的巧克力。透过紫色的雾,常常看见母亲温柔敦厚的身影忙碌着,她清扫擦洗的声音常是我梦境舒缓的背景音乐。
⑦白昼和黑夜的影子日复一日在帘中游移,蔷薇的紫色被时间的河水点点稀释,直到那穿行过多年的弄堂写满了刺目的“拆”字,我终于意识到我将告别这深居于一面开满蔷薇花的轻软墙壁。那一天,妈妈和我把帘子和写满的日记一起收在箱底,虔诚得犹如参加宗教仪式。也许我们都知道,日记写着我一个年代的心情,而那一条紫花布帘曾经包容的是我整个世界。
17.通读全文,说说作者围绕“那一条紫花布帘”写了哪些温馨的生活片段?(4分)
18.本文语言优美,富有表现力。请赏析下面的句子。(3分)
玻璃风铃垂在书架前,宛如凝固的露珠,生动敏感,不胜一缕细若游丝的风和轻微的触碰。
19.第④节划线句“我久久地翻阅着,古旧的手镯和线装书慢慢有了目光的鲜活和血液的温度。 ”有什么深刻含义,请结合文章加以阐释。(2分)
20.文章以“那一条紫花布帘”为题有什么作用?(2分)
21. 作者为什么说“那一条紫花布帘曾经包容的是我整个世界” (3分)
(六)(10分)
22.根据课文默写。(10分)
①长风万里送秋雁, 。
② ,燕然未勒归无计。
③夕阳西下, 。
④ ,归思方悠哉。
⑤ ,怅望青田云水遥。
⑥翅湿沾微雨, 。
⑦ ,到乡翻似烂柯人。
⑧ ,病树前头万木春。
⑨春蚕到死丝方尽, 。
⑩ ,夜吟应觉月光寒。
三、名著阅读。(6分)
23. 趣说水浒人物。(3分)
话说108位好汉齐聚水泊梁山,人人各具本领。国家体育总局拟决定到梁山招募“射击、拳击、举重、马拉松、游泳、跳高”项目的运动员,你觉得哪些好汉可以入选。请任选3个项目,写出对应的“运动员”的绰号和姓名。
24. 我国古典名著《水浒传》塑造了许多栩栩如生的人物形象,十分生动地描写了被压迫者先后走向造反之路的过程,歌颂了他们的反抗精神和正义行动。请从以下五位梁山好汉:宋江、卢俊义、武松、林冲、杨志,任意选择一位人物,说说他走上梁山的原因。(3分)
四、作文(60分)
在成长的道路上,有一些人,或亲人,或同学,或对手……有一些物,或书籍,或用具,或爱物,常与我们一路同行,相伴相随,不经意间,给我们以鼓舞,以智慧,以力量 ……
请以“ ,与我同行”为题目,写一篇记叙文。
(1)先将题目补充完整。
(2)详略得当,不少于600字。
(3)文中不得出现真实的姓名、校名、地名。2011—2012学年度第二学期作业检查
初二数学 2012年5月
一、选择题(本大题共l0小题.每小题3分.共30分.)
1.下列不等式中,一定成立的是 ( )
A. B. C. D.
2.若分式的值为0,则x的值为 ( )
A. 1 B. 1 C. ±1 D.2
3.一项工程,甲单独做需天完成,乙单独做需天完成,则甲乙两人合做此项工程所需时间为 ( )
A. 天 B. 天 C. 天 D. 天
4. 若反比例函数的图象经过点,则这个函数的图象一定经过点 ( )
A.(1,2) B.(2,1) C.(1,2) D.(1,2)
5. 下列关于x的一元二次方程中,有两个不相等的实数根的方程是( )
A.x2+1=0 B.x2-2x+1=0 C.x2+x+2=0 D.x2+2x-1=0
6.如图,DE∥FG∥BC,AE=EG=BG,则S1:S2:S3= ( )
A.1:1:1 B.1:2:3 C. 1:3:5 D. 1:4:9
7.如图,每个小正方形边长均为1,则下列图中的三角形(阴影部分)与左图中△ABC相似的是( )
8.如图,在矩形ABCD中,点E在AB边上,沿CE折叠矩形ABCD,使点B落在AD边上的点F处,若AB=4,BC=5,则tan∠AFE的值为( )
A. B. C. D.
9.对于句子:①延长线段AB到点C;②两点之间线段最短;③轴对称图形是等腰三角形;④直角都相等;⑤同角的余角相等;⑥如果│a│=│b│,那么a=b.其中正确的句子有( )
A.6个 B.5个 C.4个 D. 3个
10. 如图,在正方形ABCD中,点O为对角线AC的中点,过点O作射线OM、ON分别交AB、BC于点E、F,且∠EOF=90°,BO、EF交于点P.则下列结论中:
(1)图形中全等的三角形只有两对;(2)正方形ABCD的面积等于四边形OEBF面积
的4倍;(3)BE+BF=OA;(4)AE2+CF2=2OP OB,正确的结论有(  )个.
A、1 B、2 C、3 D、4
二、填空题(本大题共8小题,每小题2分,共l6分.)
11.在比例尺为1:20的图纸上画出的某个零件的长是32cm,这个零件的实际长是 cm .
12.小刚身高1.7m,测得他站立在阳光下的影子长为0.85m.紧接着他把手臂竖直举起,测得影子长为1.1m,那么小刚举起手臂超出头顶______________m.
13.如图,D,E两点分别在△ABC的边AB,AC上,DE与BC不平行,当满足_______________条件(写出一个即可)时,△A
14.如图, 点A的坐标为(3,4),点B的坐标为(4,0), 以O为位似中心, 按比例尺1:2将△AOB放大后得△A1O1B1, 则A1坐标为______________.
15. 若关于x的分式方程 有增根,则 .
16. 已知函数,其中表示当时对应的函数值,
如,则=_______.
17. 如图,△ABC与△DEF均为等边三角形,O为BC、EF的中点,则AD:BE=________.
18.两个反比例函数(k>1)和在第一象限内的图象如图所示,点P在的图象上,PC⊥x轴于点C,交的图象于点A,PD⊥y轴于点D,交的图象于点B,当点P在的图象上运动时,以下结论:①△ODB与△OCA的面积相等;②四边形PAOB的面积不会发生变化;③PA与PB始终相等;④当点A是PC的中点时,点B一定是PD的中点.其中一定正确的是 (把你认为正确结论的序号都填上).
三、解答题(本大题共10小题.共84分.)
19.(本题满分15分)
(1)解不等式组 (2)解分式方程: (3)求值: eq \f(1,1) 3tan230+2
20.(本题满分5分)计算:
先化简再求值:,其中.
21.(本题满分8分) 如图,已知反比例函数(k1>0)与一次函数 相交于A、B两点,AC⊥x轴于点C. 若△OAC的面积为1,且tan∠AOC=2 .
(1)求出反比例函数与一次函数的解析式;
(2)请求出B点的坐标,并指出当x为何值时,反比例函数y1的值大于一次函数y2的值?
22.(本题满分8分) 健身运动已成为时尚,某公司计划组装A、B两种型号的健身器材共40套,捐给社区健身中心.组装一套A型健身器材需甲种部件7个和乙种部件4个,组装一套B型健身器材需甲种部件3个和乙种部件6个.公司现有甲种部件240个,乙种部件196个.
(1)公司在组装A、B两种型号的健身器材时,共有多少种组装方案?
(2)组装一套A型健身器材需费用20元,组装一套B型健身器材需费用18元,求总组装费用最少的组装方案,最少总组装费用是多少?
23.(本题满分8分) 学习过三角函数,我们知道在直角三角形中,一个锐角的大小与两条边长的比值相互唯一确定,因此边长与角的大小之间可以相互转化.
类似的,可以在等腰三角形中建立边角之间的联系,我们定义:等腰三角形中底边与腰的比叫做顶角的正对(sad).如图,在△ABC中,AB=AC,顶角A的正对记作sadA,这时sad A=.容易知道一个角的大小与这个角的正对值也是相互唯一确定的.
根据上述对角的正对定义,解下列问题:
(1)sad60°的值为(  )A. B.1 C. D.2
(2)对于0°<A<180°,∠A的正对值sadA的取值范围是_________________.
(3)已知sinα=,其中α为锐角,试求sadα的值.
24. (本题满分8分)如图,一架飞机由A向B沿水平直线方向飞行,在航线AB的正下方有两个山头C、D.飞机在 A处时,测得山头C、D在飞机的前方,俯角分别为60°和30°.飞机飞行了6千米到B处时,往后测得山头C的俯角为30°,而山头D恰好在飞机的正下方.求山头C、D之间的距离.(结果保留根号)
25.(本题8分) 如图(1),将菱形纸片AB(E)CD(F)沿对角线BD(EF)剪开得到△ABD和△ECF,固定△ABD,并把△ABD与△ECF叠放在一起。
操作:如图(1),将△ECF的顶点F固定在△ABD的BD边上的中点处,△ECF绕点F在BD边上方左右旋转,设旋转时FC交BA于点H(H点不与B点重合),FE交DA于点G(G点不与D点重合)。
求证:BH·GD=BF2
(2) 操作:如图,△ECF的顶点F在△ABD的BD边上滑动(F点不与B、D点重合),且CF始终经过A,过点A作AG∥CE,交FE于点G,连接DG。探究:FD+DG=____________。请予以证明。
26.(本题12分)如图,已知直线与直线相交于点分别交轴于A、B两点.矩形的顶点分别在直线上,顶点都在轴上,且点与点重合.
(1)求的面积;
(2)求矩形的边与的长;
(3)若矩形沿轴的反方向以每秒1个单位长度的速度平移,设移动时间为秒,矩形与重叠部分的面积为,求关的函数关系式,并写出相应的的取值范围.
27.(本题满分12分) 如图1,在等腰梯形中,,是的中点,过点作交于点.,.
(1)求点到的距离;
(2)点为线段上的一个动点,过作交于点,过作交折线于点,连结,设.
①当点在线段上时(如图2),的形状是否发生改变?若不变,求出的周长;若改变,请说明理由;
②当点在线段上时(如图3),是否存在点,使为等腰三角形?若存在,请求出所有满足要求的的值;若不存在,请说明理由.
2011—2012学年度第二学期作业检查
答 案
一、选择题:
1-5 ADCDD 6-10 CBCCC
二、填空题:
11、640 12、0.5 13、∠AED=∠B或∠ADE=∠C或
14、(6,8)或(6,8) 15、8 16、5151 17、 18、①②④
三、解答题
19、(1)1<x≤4 (2)x=2是原方程的解; (3)2
20、化简得: 代入求值:1-
21、(1) ,y=x+1
(2)B(2,1) x<2或0<x<1
22、解:(1)设该公司组装A型器材x套,则组装B型器材(40﹣x)套,依据题意得
解得22≤x≤30,
由于x 为整数,所以x取22,23,24,25,26,27,28,29,30.
故组装A、B两种型号的健身器材共有9套组装方案;
(2)总的组装费用y=20x+18(40﹣x)=2x+720,
∵k=2>0,
∴y随x的增大而增大,
∴当x=22时,总的组装费用最少,最少组装费用是2×22+720=764元,
总的组装费用最少的组装方案为:组装A型器材22套,组装B型器材18套.
23、(1)B;(2)0<sadA<2;(3)
24、千米。
25、(1)略;(2)BD;略
26、(1)36; (2)DE=4,EF=8; (3)
27、(1) (2)①不发生变化。周长为;②2或4或5
第6题
A.
B.
C.
D.
A
B
C
第8题
第7题
A
B
C
D
F
E
O
第17题
第14题
第18题
第13题
A
B
C
A
D
B
E
O
C
F
x
y
y
(G)
图3
图2
图1
备用图
备用图

展开更多......

收起↑

资源列表