资源简介 (共37张PPT)Unit 7 Teenagers should be allowed to choose their own clothes.Section B教材核心知识精练一、词汇运用(A)根据句意及首字母提示写出单词1.新素材 Before e ________the space station, the Shengzhou-17 crewspent nearly two hours on preparatory work.2.新素材To better s________ the development of rural industries, in 2023China has taken a series of measures to improve customer service.3.[2022贵港中考改编]The English club is a good c ______for anybodythat enjoys learning English.nteringupporthoice(B)用所给单词的适当形式填空4.We have nothing against ________(play)computer games, but don'tplay them too long.playing【解析】 have nothing against doing sth."不反对做某事",为固定搭配。5.Trust yourself. Confidence is the key to your ________ (succeed).success【解析】 形容词性物主代词后接名词,故此处应用succeed的名词形式success。二、单项填空1.Only yesterday ___ find out that his purse was lost.CA.he was B.was he C.did he D.he did【解析】 句意:直到昨天他才发现他的钱包丢了。当only位于句首,其后接副词/介词短语/状语从句时,句子要部分倒装,故可排除A、D两项。find out为动词短语,故选C。2.—Is Miss Li ___ giving up her job —Yes. She is leaving for Shanghai and will find a new job there.DA.famous for B.good at C.interested in D.serious about【解析】 ——李小姐要辞职是认真的吗?——是的。她将要去上海并在那里找一份新工作。be serious about"对……是认真的",符合语境。3.[2023石家庄市第四十二中学期末]—Do your hobbies ___ yourschoolwork, Paula —Yes, sometimes. I think I should learn to plan my time carefully.BA.take the place of B.get in the way ofC.have nothing to do with D.play a part in【解析】 ——葆拉,你的业余爱好有没有阻碍你的学业? ——是的,有时会。我认为我应该学会认真规划我的时间。take the place of "代替,取代";get in the way of "阻碍,妨碍";have nothing to do with"与……无关";play a part in"起作用"。根据答语"I think I should learnto plan my time carefully"可知,要计划好自己的时间,所以此处是问爱好是否妨碍学业。故选B。4.We should___ the old and offer our seats to them on buses.DA.laugh at B.worry about C.agree with D.care about【解析】 句意:我们应该关心老人,在公共汽车上给他们让座。laughat"嘲笑";worry about"担心";agree with"同意";care about"关心"。5.—Hanfu lovers ___ walking down the street in many cities.—Well, wearing hanfu helps to understand the Chinese culture.AA.can be found B.can find C.must be found D.must find【解析】 ——在许多城市的大街上都能找到汉服爱好者。——嗯,穿汉服有助于了解中国文化。"Hanfu lovers"与find是被动关系,应用被动语态,排除B项和D项。根据句意可知,此处表示能在大街上找到汉服爱好者。故选A。Section B语用能力提升训练一、根据汉语意思完成句子(每空一词)1.会议期间请勿使用手机。Please ______ ____ mobile phones during the meeting.keepoff2.彼得经常担心测验不及格。Peter often worries about _______ ______ _____.failinga/thetest3.父母不应对青少年太过严格。Parents should not be too ______ ______ teenagers.strictwith4.我们每天应当尽可能多地练习说英语。We should practice speaking English ____ _______ ____ we can everyday.asmuchas5.这些船走了不同的路线,但是它们最后都到达了同一个地方。The boats took different routes, but they all _______ ____ in the sameplace.endedup二、按要求完成句子(每空一词)1.I will ask someone to water my flowers.(改为同义句)I will ______ my flowers _________.havewatered2.He should be allowed to choose his own clothes.(对画线部分提问)_______ should he be allowed ___ ____?Whattodo3.We must wash our hands before meals. (改为被动语态)Our hands ______ ____ ________ before meals.mustbewashed4.I think the students should be allowed to go out with their friends.(改为一般疑问句)____ _____ ______ the students should be allowed to go out with theirfriends Doyouthink5.[2023达州中考一模]We should put each kind of sources to good useand not waste them. (改为同义句)Each kind of sources should ____ put to good use and not be ________.bewasted三、用方框中所给单词的适当形式补全短文(有两词多余)新风向·语篇串考课本新词allow, smoke, regret, chance, late, hug,support, enter, private, rule, safe, licenseMany families find it useful to write down some 1______ aboutwhat family members are expected to do. Every family member shouldknow what is or isn't 2________. The rules can be stuck (粘贴) onthe fridge. In that way, young children can have a 3________ to readthem.rulesallowedchanceRules are also helpful to teenagers. Instead of sticking the rules onthe fridge, it's a good idea to keep them somewhere a little more4________. For example, teenagers can stick the rules on the walls oftheir bedrooms.Here are what you can do for the rules:When to start making rulesYou can manage to make simple rules as soon as your child is ableto understand them. Young children need parents' 5________ to followthe rules. You can give your child a 6_____ if he or she does well.privatesupporthugTeenagers and rulesRules about 7_______ are helpful to teenagers. Many people thinkteenagers should not be allowed to stay out 8_____. Besides, without adriver's 9_______, teenagers should not drive a car. Rules about healthare also very necessary. Teenagers shouldn't 10_______, it's bad for theirhealth.safetylatelicensesmokeSection B阅读能力强化训练一、阅读理解素养:思维品质 话题:故事 难度:中 建议用时:7分钟"Late again, Mavis! How many times have I told you to come backin time to help me cook dinner " asked Mrs. Muntari."But, Mum, I can't just walk away in the middle of a game!" saidMavis."You shouldn't be playing the game in the first place.""But, Mum, why can't I You never tell Adibe or Senze not to playfootball. I had to leave the game at half-time and rush back so youwouldn't get angry with me," said Mavis."You are a girl! It is as simple as that. Boys and girls havedifferent roles to play. I have 11 hungry mouths to feed and I need yourhelp! You are the oldest girl not working, so it is your job to help me.That's the way of our people. Now go and fry some more chicken..."At the dinner table, Adibe and Senze were excitedly talking abouttoday's game, while eating the chicken Mavis had fried. They talkedabout how Mavis scored in the first half with a power shot from thehalfway line. It was a great goal as their team was losing by 0-1 at thattime.Dad came home then and brought the boys a local newspaper, inwhich there was news about football scouts from England visiting Ghana(加纳). These scouts had asked to be allowed to visit schools to lookfor players of the future. Adibe and Senze looked at each other andcheered, "Wow, I'm going to be like Essien!" And they started arguingwhich one would make it as a superstar.Mavis decided to take this chance. She stole out of home. Whenshe arrived at the playground, one player happened to get injured (受伤)and the coach was worried. " I can take his place!" Mavis shouted.Though it was unbelievable to let a girl play, the coach agreed. Duringthe second half, she made an amazing shot!When the game was over, the scouts all stood up, cheering.【解题导语】 本文主要讲述了Muntari夫人不赞成自己的女儿Mavis放学后参加体育训练比赛,Mavis却在一次选拔比赛中表现出色。本文通过讲述Mavis不甘于平庸,不屈服于现实,敢于提出质疑,独立思考,作出正确的价值判断,并努力寻找机会,勇于为自己的未来拼搏,体现了思维品质这一核心素养。1.Why was Mrs. Muntari unhappy with Mavis ( )CA.Mavis didn't like cooking. B.Mavis' team lost the game.C.Mavis arrived home late again. D.Mavis left the game at half-time.【解析】 细节理解题。根据第一段中的"Late again, Mavis! How manytimes have I told you to come back in time"可知,Muntari夫人不开心是因为她的女儿Mavis又一次晚回家了。2.Why wasn't Mavis supported by her mother in playing football?( )AA.Because she was a girl. B.Because she wasn't talented.C.Because she was too old. D.Because her brothers did better.【解析】 细节理解题。根据第五段中的"You are a girl! It is as simpleas that"可知,Mavis不被支持参加足球训练,是因为Muntari夫人觉得她是个女孩,不应该踢球。3.What does the underlined word "scouts" mean ( )DA.People who fight against with you.B.People who are on the same team as you.C.People who make footballs for you.D.People who look for good sports players.【解析】 词义猜测题。根据下文中的"These scouts had asked... look forplayers of the future"可推知,画线词的意思应是D项。词义猜测题是选择型阅读理解中常见的题型,它考查的并不是学生的词汇量,而是学生是否能够理解某个单词或短语在特定的语言环境中的具体含义。解答这类题时有一定的技巧。比如:①根据同义词或近义词来推测词义。②根据上下文之间的联系来推测词义。③根据定义或释义来推测词义。此时画线词之后通常有that is,that means,that is to say或破折号等。④根据构词法来推测词义。常见的构词法主要有派生、转化和合成。4.Mavis decided to ___ at the news about the scouts.AA.catch the scouts' eye B.get away from her homeC.become another Essien D.take the place of the injured【解析】 细节理解题。根据第七段中的"These scouts had asked to beallowed to visit schools to look for players of the future"以及倒数第二段中的"Mavis decided to take this chance"可知,Mavis 想要抓住这次机会一举成名,吸引球探老师的注意。5.新考法·创新性设问What's the probable ending of the story ( )BA.Mavis had to find a job.B.Mavis was chosen by the scouts.C.Mrs. Muntari said sorry to Mavis.D.Mavis changed the woman's role.【解析】 推理判断题。根据倒数第二段中的"she made an amazing shot"以及最后一段"When the game was over, the scouts all stood up,cheering"可知,球探老师们被Mavis完美的进球深深震撼,都站起来欢呼,由此推知故事的结局可能是她被球探们选中。语篇精读二、任务型阅读素养:思维品质 话题:成功的法则 难度:中 建议用时:7分钟[2022邵阳中考改编] There are many successful people in the world.1___ If you do all these, you will succeed like them.Speak less. Let your results speak for you. You don't always needto tell everyone what you are doing, or what you're planning to achieve.2___ People will notice and respect you more if they see your resultsbefore they hear your plans.ECListen more. You can not learn if you do not listen. 3___ Listenwith purpose. If you are serious about making your life great, you haveto be devoted to(致力于) it.4___ The closer you observe, the better your understanding anddecisions will be. Pay close attention to those you admire. Pay closeattention to what you want to master. Observe what works and whatdoesn't work in your own life and make changes.DA5___ Knowing is not enough and willing is also not enough. Wemust do. If you want anything in life, it's not coming to you while yousit on your hands. Get up, get out there and get it. Do whatever youcan to achieve your great goals.根据材料内容,从下面五个选项中选出能填入文中空缺处的最佳选项A. Observe more.B. Finally, take action.C. Let your results do the talking.D. You can not grow if you do not learn.E. The following rules of success are of great importance to you.B【解题导语】 本文阐述了成功的法则——少说、多听、多观察并行动起来。1.___E【解析】 空处点出成功的法则,起承上启下的作用,故选E。2.___C【解析】 根据本段主题句"Speak less"以及上文中的"Let your resultsspeak for you"可知,空处呼应前文,故选C。3.___D【解析】 根据上文中的"You can not learn if you do not listen"可知,D项符合题意。4.___A【解析】 根据本段中的"observe"可知,A项为本段的主题句。5.___B【解析】 根据上下文的内容可知,空处强调了做的重要性,故选B。【语篇解构】 阅读文章,补充下面的结构图(每空一词)ImportantListenresultslifeachieve【读写联动】 成功的法则有很多,除了本文中提到的法则之外,请用英语写下你认为成功人士应该具备的特点,并谈论理由。(一至两点即可)____略(共43张PPT)Unit 7 Teenagers should be allowed to choose their own clothes.Section A教材核心知识精练一、词汇运用(A)根据汉语或首字母提示写出单词1.[2022 盐城中考]Fishing in Snow, written by Liu Zongyuan, is one ofmy favorite _______ (诗歌).2.[2023安徽中考改编]I don't _______(后悔) many things about myschool days, for they are just part of my life.poemsregret3.新素材 The first "forest library" provides readers with a ________(机会) to read in a natural environment.4.As a student, you must stay away from s________ and drinking.chancemoking5.[2022成都中考]The Chengdu Plain belongs to the country's double-planting area. This means wheat(小麦)and rice are planted in the samef__________.ield/fields熟词生义A.n.领域B.n.运动场C.n.田野(1)He is famous in the field of music.___(2)He was the fastest player I ever saw on a baseball field.___(3)People were working in the fields. ___ABC(B)用所给单词的适当形式填空6.[2022无锡中考]For your own _______ (safe), you shouldn't climbmountains alone.safety【解析】 own是形容词,修饰名词,形容词safe的名词为safety,意为"安全",是不可数名词。7.Together, they produced a system of pulleys(滑轮) and ______ (lift)a basket with some of Hank's favorite things up to him.lifted【解析】 分析句子结构可知,and连接两个谓语动词,produced是过去式,and后也应用过去式,故填lifted。熟词生义A.v.举起 B.n.电梯C.v.消散D.n.搭便车(1)The fog began to lift.___(2)He put his arms around her and lifted her.___(3)Let's take the lift to the sixth floor.___(4)I will give you a lift to the station.___CABD8.Children should be _________ (educate)to respect and help otherpeople.educated【解析】 句意:应该教育孩子们尊重并帮助别人。空处用被动语态,故填educated。9.Li Hong did_______ (bad) in the English exam. I'm afraid he willlet his parents down.badly【解析】 空处修饰动词did,应用副词badly"不成功地,受挫"。bad作副词时意为"很,非常"。10.Mr. Black________ (hug) his son and went out of the room.hugged【解析】 空处在句中作谓语,且与went是并列关系,应用一般过去时。hug的过去式为hugged。二、单项填空1.[2024淮北烈山区三模]What a terrible experience! ___, lucky us, we aresafe now.AA.Anyway B.Otherwise C.For example D.As a result【解析】 句意:这经历太可怕了!无论如何,我们真幸运,我们现在安全了。anyway"反正,无论如何";otherwise"否则";for example"例如";as a result"结果"。根据句意可知A项符合语境。2.[2023营口中考]The football match was put off as a result of the ___weather.DA.wonderful B.exciting C.difficult D.awful【解析】 句意:由于天气恶劣,足球比赛被推迟了。根据"The footballmatch was put off"可知,天气不好,所以比赛被推迟,awful符合语境。3.I think AI (人工智能) ________ in many fields will ________ tohelp us solve more problems in the future.( )AA.used; be used B.is used; be used C.used; use D.is used; use【解析】 句意:我认为应用于许多领域的人工智能在将来会被用来帮助我们解决更多问题。第一空应用过去分词used作后置定语,修饰AI;第二空应用被动语态来表示"被用来做某事",根据空前的情态动词will可知,空处应用动词原形。4.In the summer camp, the boy ___ to overcome all kinds of difficulties.AA.managed B.happened C.remained D.refused【解析】 句意:在夏令营里,这个男孩成功克服了各种各样的困难。manage"完成(困难的事),应付(困难局面等)",符合题意。5.—Sir, you drove so fast just now. Could I see your driver's ___?—OK. Here you are.BA.skill B.license C.research D.project【解析】 ——先生,你刚才车开得太快了。我能看看你的驾照吗?——可以。给你。driver's license"驾驶执照"。Section A语用能力提升训练一、用方框中所给短语的适当形式填空(每个短语限用一次)keep away from, be worried about, talk back,make one's own decisions, agree with1.Don't let others influence you. You should ________________________.make your own decisions【解析】 句意:不要让别人影响你,你应该自己做决定。根据You及should可知,应填make your own decisions。2.They will all___________ Laura because they think she is right.agree with【解析】 句意:他们都将同意劳拉的看法,因为他们觉得她是对的。根据will可知,应填agree with。3.He _________________ the safety of the children all the time.is worried about【解析】 句意:他一直担心孩子们的安全。根据时间状语all the time和主语He可知,应填is worried about。4.You shouldn't __________ to your parents. You should listen to them.talk back【解析】 句意:你不应该和你父母顶嘴,你应该听他们的话。shouldn't后应用动词原形。5.In daily life, everyone should ________________the lies. After all,being honest comes first.keep away from【解析】 句意:在日常生活中,每个人都应该远离谎言。毕竟,诚实最重要。should后应用动词原形。二、根据汉语意思完成句子(每空一词)1.在你离开教室之前,确保窗户都关好。_______ _____ the windows are closed before you leave the classroom.Makesure2.无论发生什么事,我都会一直在你身旁。No matter what happens, I will always _____ ____ ______ _____.staybyyourside3.对演讲的话题感到兴奋这对于所有好的演讲者都是必要的。_______ ________ _______ the topic is necessary for all the goodspeakers.Beingexcitedabout4.请小心使用这把刀,否则你会伤到自己。Please use the knife carefully, or you may ______ _________.hurtyourself5.我哥哥没到参军的年龄。My brother isn't ____ ________ to join the army.oldenough三、从方框中选择最佳选项补全对话(有两项多余)[2023黄山中考一模]A: Hi, Tony! You look so sad. What's the matter B: I like basketball very much, but my parents don't allow me to play itsince I am in Grade 9.A: Maybe your parents are right. 1___B: I see. But I do well in all my lessons and I should be allowed todo what I'm interested in.AA: 2___ Communication is very important.B: All right. I'll have a try. What about you, Lisa Do you have anyrules at home A: Yes, of course. 3___ They've made a lot of rules for me. I must domy homework as soon as I arrive home. 4___B: I'm luckier than you. I can wear whatever I like. 5___A: I think some of the rules are necessary. They help me develop goodhabits. Maybe some of them are unfair to me.FBGDA. Study should come first.B. My parents are strict with me.C. I can't make my own decisions.D. What do you think of these rules E. Who made these rules for you F. Why not have a talk with your parents G. And I am not allowed to choose my own clothes.四、语法专练用括号中所给单词的适当形式补全短文Rajbhandari is from Nepal (尼泊尔). Now she is studying at theSilk Road School of Renmin University of China in Beijing.In 2015, Rajbhandari 1_____________ (allow) to study in Chinaby her parents. She first learned Chinese at Beijing Language andCulture University's pre-university program. She found it important thatChinese 2___________________ (should, practice) again and again.And her teacher told her that if she passed her language test, shewas allowedshould be practiced3_______________ (could, give) a chance to learn Chinese politics(政治学) in the university. Later, she got the offer and she decided toaccept it, but most of her friends were against it."Some people 4__________________ (may, influence) by wrongmessages, so they often have a skeptical view (怀疑的观点) ofstudying politics in China. In fact, over the past forty years, greatchanges 5_________________ (take place) everywhere in China. As aresult, in order to be able to understand international politics, one has tobegin with understanding China's politics. I believe this is exactly whycould be givenmay be influencedhave taken placestudying politics in China 6____________________ (must, encourage).I hope that Chinese politics 7_______________ (study) by morepeople in the future," said Rajbhandari when she was interviewed.must be encouragedwill be studiedSection A阅读能力强化训练一、完形填空素养:学习能力 话题:"双减" 难度:中 建议用时:7分钟原创题 The nationwide "double reduction" education policy —which aims to . .1. . students' homework and reduce the need for after-school lessons — takes effect(生效).Since summer, several. .2. ., including Beijing and Shanghai, havebeen carrying out the "double reduction" rules, which have requiredpublic schools that teach compulsory education to offer after-schoolcourses to students. The rules aim to bring students back to schoolyard(校园) . .3. . going to those training institutions(机构) after class.The Beijing government announced that primary schools should notassign(布置) written . .4. . for students in grades one and two, and thequantity(数量) of homework for other grades should be . .5. . in orderto lighten students' burden. Other . .6. . in activities such as horsebackriding, golf, badminton, skating and Chinese chess are gaining popularityas parents hope to enrich their children's education after class.Ye Xiaoyan, mother of a 7-year-old boy, said . .7. . son now has nohomework to do after school, and the math courses he took during theweekends have . .8. .."I plan to let him learn horseback riding, which I believe will helphim become . .9. . ," she said. "It's a good thing to have less homeworkand fewer training courses outside of school. It's more important to havegood art . .10. . and a strong body than high scores, in my opinion."【解题导语】 本文主要介绍了在国家"双减"政策下学生发生的变化及父母的态度。1.( ) A.cut off B.cut in C.cut up D.cut downD【解析】 根据空后的"and reduce"可知,空处表示的意思和reduce相近,故cut down"减少"符合语境。cut off"切掉";cut in"打断";cut up"切碎"。2.( ) A.countries B.cities C.schools D.companiesB【解析】 根据下文中的"including Beijing and Shanghai"可知,此处说的是城市。3.( ) A.because of B.instead of C.according to D.besidesB【解析】 此处是说这些规则的目的是让学生回到校园,而不是课后去那些培训机构。 because of"因为";instead of"代替,而不是";accordingto"根据"; besides"除……之外(还)"。4.( ) A.homework B.books C.jobs D.timeA【解析】 根据下文中的"and the quantity(数量) of homework forother grades"可知,空处应为homework。5.( ) A.written B.increased C.finished D.reducedD【解析】 根据第一段中的"reduce the need"及全文中讲的"双减"政策可知,这里是指其他年级的作业量也应减少。6.( ) A.hobbies B.habits C.interests D.coursesD【解析】 根据最后一段中的"fewer training courses"可知答案。hobby"爱好";habit"习惯";interest"兴趣";course"课程"。7.( ) A.her B.his C.their D.yourA【解析】 根据空前的"mother of a 7-year-old boy"可知选A。8.( ) A.refused B.kept C.stopped D.takenC【解析】 结合上文中的"has no homework to do after school"以及本文的主题可知,C项符合语境。9.( ) A.more nervous B.braver C.shyer D.cuterB【解析】 根据上文中的"horseback riding"可知,骑马应会让人更勇敢。10.( ) A.smell B.taste C.look D.soundB【解析】 此处是说有良好的艺术品味和强壮的身体比高分更重要。arttaste"艺术品味"。二、阅读理解素养:思维品质 话题:规则 难度:中 建议用时:8分钟[2023东营市实验中学练习] When you want to ask your teacher aquestion during class, what do you do Do you simply shout out yourquestion as soon as it enters your mind Or do you raise your hand andwait until the teacher calls your name If you politely raise your hand first, it's probably because yourteacher has a rule that regulates (管理) what you are allowed to dowhen you have a question. Can you imagine what it would be like ifeveryone can simply talk whenever they want during class Instead of apeaceful learning environment, a classroom without rules would bechaotic (混乱的)!When you learn to drive, you'll realize how many rules you have tofollow. The rules for driving share a common purpose (目的) withmany rules you must follow in your daily life to keep you safe. As anancient Chinese saying goes, "No rules, no standards." If you make a listof the rules you follow each day, you will quickly realize how many ofthem can keep you safe and make your life more enjoyable as a result.Although sometimes you feel like a rule is unjust (不公平的),don't break it. Instead, decide what you can do to change the rule.Working within the rules to change the rules is what you need to do.【解题导语】 本文主要介绍规则的重要性。如果你先礼貌地举手,这可能是因为你的老师有一个规定,规定当你有问题时你可以做什么。1.新考法·写作手法题 How does the writer start the passage ( )CA.By giving examples. B.By describing a situation.C.By asking some questions. D.By providing some materials.【解析】 写作手法题。根据第一段中连续提出的三个问题可知,作者是通过提问来开篇的。2.To keep order in the classroom, what can teachers do according toParagraph 2 ( )BA.Change some unjust rules.B.Set some rules in advance(提前).C.Punish students who break the rules.D.Teach students how important rules are.【解析】 细节理解题。根据第二段中的"If you politely raise your handfirst, it's probably because your teacher has a rule that regulates (管理)what you are allowed to do when you have a question...Instead of apeaceful learning environment, a classroom without rules would bechaotic (混乱的)!"可知,教师通过预设一些规则来维护教室的秩序。3.跨学科·语文 What does the underlined sentence in Paragraph 3 meanin Chinese ( )DA.吃一堑,长一智。 B.不入虎穴,焉得虎子。C.有则改之,无则加勉。 D.不以规矩,不成方圆。【解析】 句意理解题。根据画线句子"No rules, no standards"中的"rules"可知,这个谚语和规则有关,故D项"不以规矩,不成方圆"符合题意。4.What can we learn from the passage ( )CA.We needn't pay attention to unjust rules.B.We can't make efforts to change the rules.C.Following rules can give you a safe and happy life in a way.D.The writer gives an example to explain what rules are unjust.【解析】 细节理解题。根据第三段中的"If you make a list of the rulesyou follow each day, you will quickly realize how many of them cankeep you safe and make your life more enjoyable as a result"可知,遵循这些规则可以在某种程度上给你一个安全快乐的生活。5.What is the passage mainly about ( )BA.The ways of making fair rules.B.The importance of rules.C.Why rules can influence our lives.D.How students should act in school.【解析】 主旨大意题。通读全文尤其是最后一段可知,本文主要讲述了为什么社会需要规则,即规则的重要性。 展开更多...... 收起↑ 资源列表 Unit 7 Section A分层练习课件 2023-2024学年人教版英语九年级全册.pptx Unit 7 Section B分层练习课件 2023-2024学年人教版英语九年级全册.pptx