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选修一Unit 5必记必背
词性变化
devote vt.把……献（给）；把……专用于；专心于→devotion n.奉献；忠诚；挚爱
shortage n.不足；缺少；短缺→short adj.短的；矮的；缺乏的；简略的→shorten v.(使)变短，缩短;
convince vt.使相信；使确信；说服→convincing adj.有说服力的；使人信服的→convinced adj.确信的；坚信的
assumption n.假定；设定；（责任的）承担；（权力的）获得→assume v.假定；设想；承担（责任）→assuming conj.假定；假设
expand vt.& vi.扩大；增加 vt.扩展；发展（业务）→expansion n.扩大；扩张；扩充
salty adj.含盐的；咸的→salt n.盐
extension n.扩建部分；扩大；电话分机→extend vt.伸开；展开；延伸
chemical adj.与化学有关的；化学的 n.化学制品；化学品→chemistry n.化学→chemically adv.化学上地 →chemist n.化学家；药剂师
nutritional adj.营养（物）的→nutritious adj.有营养的；营养丰富的→nutrition n.营养；滋养
depth n.向下（或向里）的距离；深（度）→deep adj.深的→deeply adv.深深地；强烈地→deepen vt.加深;（使）变深
entirely adv.全部地；完整地；完全地→entire adj.全部的；完全的
characteristic n 特点；特征；品质； adj 典型的；独特的→character n 性格；特色
intense adj 热切的；十分热烈的；激烈的---intensive adj 密集的; 集约的; 彻底的; 十分细致的; 短时间内集中紧张进行的---intensity n.强烈，剧烈；（光、声音等的）强度
vision n 想象；视力；视野；影像---visional adj 视力的；虚幻的---visible adj.明显的；看得见的；可得到的---visibly adv.明显地；显然；看得见地---visualize v.使形象化；使可见；使显现--visual adj.视觉的；视力的；栩栩如生的
reality n 现实；事实---real adj 真正的，真实的---really adv 真正地
consumption n．消耗；消耗量；消费→consume vt.消耗；消费；吃；喝→consumer n．消费者；客户
二、词组
Reading and Thinking&Read for Writing
1.devote ...to 把……用于;献身;致力;专心
2.be comprised of　　包括；包含；由……组成（或构成）
3.deep down　在内心深处；本质上；实际上
4.in turn　　相应地；转而；依次；轮流
5.for instance　　例如；比如
6. tackle this crisis 解决危机
7.fulfil one’s dreams　实现某人的梦想
8.in fact　　事实上
9.turn to　　转向；求助于
10.nowhere near　　完全没有；远不及
11.focus on　　关注
12.be rich in　　富于；有丰富的……
13.a matter of ...　　一个……的问题
14.work the land　　田间工作
15.nowhere near 　　完全没有，远不及
16.be rich in nutrition 　　富有营养
17. be far from the case事实远非如此
18.pursue a dream 　　追求梦想
19.a serious shortage of food 食物严重短缺
20.receive an education　　接受教育
21.overcome enormous technical difficulties 　　
克服巨大的技术困难
22.receive numerous awards both in China and abroad 　　在国内外获奖无数
23.a life of leisure　　悠闲的生活
24.far from the case 　　远非如此
25.care little for celebrity or money 　　
不关心名利或金钱
26.make large donations to support agricultural research 捐许多款支持农业研究
27. switch to organic farming 转向有机农业
28. keep their soil rich and free of disease 　　
保持土壤肥沃，远离疾病
三、课文句式佳句
However, what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat. （what引导主语从句）
然而，他最担忧的是农民们的收成不好，有时甚至严重缺乏食物。
Today, it is estimated that about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuan’s hybrid strains, and his strains have allowed China’s farmers to produce around 200 million tons of rice per year. (It＋be＋过去分词＋that ...)
如今，据估算，现在中国国内消费的稻米有大约60%来自袁隆平的杂交水稻品种形成的作物，这些品种（形成的作物）让中国农民每年能够生产出大约两亿吨稻米
Given that Yuan’s hybrids made him quite wealthy, one might think he would have retired to a life of leisure. (given that ...鉴于，考虑到，引导条件状语从句)
考虑到杂交水稻使袁隆平变得相当富有，人们可能认为他会退休享受闲适的生活。
Why different crops are grown is that they put important minerals back into the ground, making it ready for the next batch of crops. (动词-ing形式作结果状语)
轮换种植的原因就是这些作物会把重要的矿物质重新释放回土壤中，为种植下一批庄稼作好准备。
What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world. (同位语从句)
阻止他们这样做的是这样一个事实，即化学耕作满足了全世界对粮食的高需求。
Indeed, his slim but strong body was just like that of millions of Chinese farmers, to whom he had devoted his life. (读后续写之人物描写)
确实，他瘦削但结实的身躯看起来和他为之奉献了一生的千千万万的中国农民一样。
四、单元话题作文（议论文写作——正反观点型）
写作内容：
Para.1 开头：提出议题（总述事件背景）
Para.2 主体：阐述两种不同看法。分别给出理由或举例。
Para.3 结尾：表明自己的观点。
注意：观点要明确，论据要充分。
Para.1导入主题
There is a widespread concern over the issue that+句子．But it is well known that the opinions concerning this hot topic vary from person to person.
人们普遍担忧关于……的问题。 但是众所周知，关于这个热门话题的观点因人而异。
Para.2 陈述双方观点
正方观点
A majority of people approve of（赞成） the opinion that _________ (正方观点)．From their point of view，there are two factors contributing to（促成，有助于） this attitude，which are as follows：in the first place， _________(原因一) ．Furthermore，_________(原因二) ．
2．反方观点
On the contrary，some people oppose the idea. They hold the view that _________(反方观点)．On the one hand，_________ (原因一)．On the other hand，_________ (原因二)．
Para.3 表达个人观点
As far as I am concerned，proper regulation (适度管理）is extremely needed to better this situation.
I think we should take effective measures to_________ (个人观点). Only in this way can we make it possible for us to have a brighter future. （只有这样我们才可能有一个更加光明的未来）

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