外研版 (2019)必修 第三册Unit 3 The world of science单元测试当堂达标检测题

这是一份外研版 (2019)必修 第三册Unit 3 The world of science单元测试当堂达标检测题，共11页。试卷主要包含了5分,满分37，BADAB; 6-10，如果你感到有危险,就摇响铃铛等内容，欢迎下载使用。

第一部分 阅读（共两节,满分50分）
（共15小题;每小题2.5分,满分37.5分）
阅读下列短文,从每题所给的A,B,C,D四个选项中选出最佳选项。
A
Dnna Strickland was awarded the 2018 Nbel Prize in Physics jintly with Arthur Ashkin and Gérard Muru. It's the first time in 55 years that a wman has wn this famus prize, but why has it taken s lng? We lk at five ther pineering female physicists—past and present—wh actually deserve the prize.
Jcelyn Bell Burnell
Perhaps the mst famus snub(冷落): then-student Bell discvered the first radi pulsars in 1967, when she was a PhD student at Cambridge. The Nbel Prize that recgnised this landmark discvery in 1974, hwever, went t her male supervisr, Antny Hewish. Recently awarded a £2.3 millin Breakthrugh Prize, which she gave away t help under-represented students, she jked t The Guardian, "I feel I've dne very well ut f nt getting a Nbel Prize."
Lene Hau
Hau is best-knwn fr leading the research team at Harvard University in 1999 that managed t slw a beam f light, befre managing t stp it cmpletely in 2001. Often tpping Nbel Prize predictin lists, culd 2019 be Hau's year?
Vera Rubin
Rubin discvered dark matter in the 1980s, pening up a new field f astrnmy. She died in 2016, withut recgnitin frm the cmmittee.
Chien-Shiung Wu
Wu's "Wu experiment" helped disprve the "law f cnservatin f parity". Her experimental wrk was helpful but never hnured, and instead, her male clleagues wn the 1957 Nbel Prize fr their theretical wrk behind the study.
Lise Meitner
Meitner led grundbreaking wrk n the discvery f nuclear fissin. Hwever, the discvery was acknwledged by the 1944 Nbel Prize in Chemistry, which was wn by her male c-lead, Ott Hahn.
1.When was the discvery f radi pulsars recgnised by the Nbel?
A.In 1944.B.In 1967.C.In 1974.D.In 1980.
2.Which wman is mst likely t win a Nbel Prize later accrding t the text?
A.Dnna Strickland.B.Jcelyn Bell Burnell.
C.Lene Hau.D.Vera Rubin.
3.What d we knw abut the five females?
A.The five female scientists did greatly in chemistry.
B.Vera Rubin had pened up a new field in gemetry.
C.Lise Meitner's teacher wn a Nbel Prize fr her wrk.
D.The five female scientists haven't been awarded Nbel Prize.
B
If yu have a bad habit f lsing things, a new device that can be cnnected t any item that yu might lse may be the way t slve yur prblem. The Tile, a small square linked up t yur iPhne r iPad via Bluetth, lets yu see hw clse yu are t the missing item, within a 50-t 150-ft range. If the item ges ut f yur phne's 150-ft range, it can still be detected n ther smart phnes with the same app.
When yu lg int the app n yur phne, it shws yu, with green bars that increase r decrease, hw far away yu are frm the Tile. Yu can als prgram it t make a sund when yu get clse t the Tile. And yu can link up yur phne with up t ten Tiles. And if yur lst item — a dg, fr example, r a stlen bike — ges ut f yur wn phne's 150-ft Bluetth range, yu can set it as a "lst item". If any f the phnes with the Tile app cmes within the range f yur lst item, a message will be sent t yur wn phne, reminding yu f its psitin. The Tile app als has the functin t remember where it last saw yur Tile, s that yu can easily find where yu left it.
Since the Tiles use Bluetth rather than GPS, they never run ut f battery r need t be charged, and they last fr ne year befre needing t be replaced.
1.The Tile app can help yu _________.
A.find yur missing itemsB.use yur phne mre wisely
C.save yur phne's battery pwerD.cnnect smething t yur phne
2.Which f the fllwing is TRUE accrding t the passage?
A.The Tile needs t be charged after a year f use.
B.One smart phne can nly be linked up t ne Tile.
C.The Tile cannt wrk when linked up t a phne withut Bluetth.
D.A missing item can't be fund if it ges ut f the needed range.
3.What des the secnd paragraph mainly tell us?
A.What the Tile app is.B.Hw the Tile app wrks.
C.The advantages f the Tile app.D.Why the Tile app was invented.
4.Where des this passage prbably cme frm?
A.A science fictin nvel.B.An advertisement.
C.A persnal diary.D.A news reprt.
C
Dgs are ur best friends. That's especially true after a disaster, such as an earthquake. When buildings fall dwn, search-and-rescue dgs help find trapped peple. Dgs' amazing nses can pick up the smell f survivrs. Nw scientists have develped an electrnic tl that des the same thing. It's taking smell detectin(探测) t a whle new level.
The new inventin is a srt f electrnic nse, which can detect extremely lw levels f many cmpunds(化合物) frm peple's skin. This isn't the first time engineers have develped such an bject. Earlier mdels, hwever, have been bulky and expensive. They culd nt detect lw levels f target cmpunds either. The new ne is inexpensive and small enugh t fit inside hand-held equipment.
The electrnic nse can detect extremely slight smell f mre than ne cmpund at the same time. "Being able t d this, in such a small bject, is the significant discvery," says Stiris E. Pratsinis, Prfessr f Prcess Engineering and Materials Science at the Swiss Federal Institute f Technlgy in Zurich. His team tested it in special spaces. They were like the small spaces where peple might be trapped. Chemicals given ff by the vlunteers built up inside. The electrnic equipment detected thse cmpunds at unbelievably lw levels.
The results were gd news fr the research team. But they may be nt fr ur fur-legged friends, wh culd sn be ut f a jb. "Ideally, this technlgy culd replace search-and-rescue dgs," Pratsinis says.
Stephen Taylr, an electrical engineer, agrees that the new technlgy has sme benefits ver dgs. Still, he thinks it may be t sn t have ur trusty friends retire. He suspects, "I fresee that such an bject culd add t the fine wrk dne by the dgs." Taylr als pints ut sme ptential limitatins f the new inventin. "E-nses are useful, but can be very likely t be affected by unstable readings and interruptin," he says.
1.Why des the authr talk abut dgs at the beginning?
A.T catch the readers' attentin.B.T intrduce the tpic abut e-nses.
C.T shw what search-and-rescue dgs d.D.T add backgrund infrmatin fr discussin.
2.Which f the fllwing best explains "bulky" underlined in Paragraph 2?
A.Cmplex.B.Fragile.C.Handy.D.Large.
3.What is Paragraph 3 mainly abut?
A.What e-nses' wrking principle is.
B.Hw e-nses are made.
C.What differences between dgs and e-nses are.
D.Hw pwerful e-nses are.
4.What des Stephen Taylr mean?
A.Dgs and e-nses culd wrk tgether.B.Search-and-rescue dgs will retire sn.
C.E-nses are mre reliable than nses f dgs.D.Dgs are better at finding ut trapped peple.
D
A warm drink f milk befre bed has lng been the best chice fr thse wanting a gd night's sleep. But nw a study has fund it really des help peple nd ff—if it is milked frm a cw at night.
Researchers have discvered that "night milk" cntains mre melatnin(褪黑激素), which has been prven t help peple feel sleepy and reduce anxiety.
The study, by researchers frm Seul, invlved mice being fed with dried milk pwder made frm cws milked bth during the day and at night.
Thse given night milk, which cntained 10 times the amunt f melatnin, were less active and less anxius than thse fed with the milk cllected during daytime, accrding t the study published in The Jurnal f Medicinal Fd.
Night milk quickened the start f sleep and caused the mice t sleep lnger.
While the effect f cws' milk harvested at different time has nt been tested n humans up t nw, taking melatnin drugs has been suggested t thse wh are struggling t fall asleep at night.
Previus studies have als indicated that milk can be excellent fr helping sleep because f the calcium cntent, which helps peple t relax.
Milk is als sugar-free and additive-free with nutritinists recmmending skimmed milk as the best chice befre bed as it is the least fattening. The mre fat yu take in befre bedtime, the greater burden yu will put n yur bdy at night.
1.Accrding t the text, the mice fed with daytime milk _________.
A.started sleep mre easilyB.were mre anxius
C.were less activeD.wke up later
2.Which f the fllwing is true f melatnin accrding t the text?
A.It's been tested n mice fr ten times.B.It can make peple mre energetic.
C.It exists in milk in great amunt.D.It's used in sleeping drugs.
3.What can be a suitable title fr the text?
A.Night Milk and SleepB.Fat, Sugar and Health
C.An Experiment n MiceD.Milk Drinking and Health
4.Hw des the authr supprt the theme f the text?
A.By giving examples.B.By stating arguments.
C.By explaining statistical data.D.By prviding research results.
第二节 （共5小题;每小题2.5分,满分12.5分）
阅读下面短文, 从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。
Scial Media
Scial media can be defined as web-based and mbile media that are used fr peple t interact, cnnect and cmmunicate with each ther. It ften invlves the creatin and sharing f cntent (writings, pictures and vides) that peple make themselves, mstly thrugh the Internet.
①_____ The first type invlves peple getting tgether t wrk n a prject, fr example, Wikipedia. Blgs and micrblgs (such as Twitter) are anther type f scial media. There are ther websites like YuTube that allw peple t share cntent such as pictures, articles r vides. ②_____ This site allws peple t stay in tuch with friends, make new nes and jin cmmunities. Facebk is an example f this type. Many peple like t play games n the Internet and, yes, there are scial media games as well. These games allw gamers t interact with each ther and play with r against ther gamers. ③_____ The final type f scial media is websites like Secnd Life, where peple can create avatars(化身) and use and create bjects, as if they were in the real wrld.
Scial media is different frm traditinal media. With scial media, many individual peple create cntent.
Anther difference is that peple wh prduce cntent in scial media dn't need very special skills. ④_____ It takes nly a few minutes t write a twitter pst, fr example. ⑤_____ But whatever yu might think, scial media is here t stay.
A. Wrld f Warcraft is a gd example.
B. And scial media cntent can be prduced much faster.
C. In general, there are six different types f scial media.
D. Anther type f scial media is the scial netwrking site.
E. Sme peple think scial media is gd and sme think it is bad.
F. In traditinal media, peple need special skills t prduce smething.
G. Scial media is ne f the fastest grwing industries in tday's wrld.
第二部分 语言运用（共两节,满分30分）
第一节 （共15小题;每小题1分,满分15分）
Mr. Jnes had always wanted t make a trip int the middle f Africa t phtgraph wild animals. 1 his wife had nt wanted him t 2 her. At last his wife agreed t the trip if he allwed her t g, t.
Mr. Jnes 3 her, "It will be very ht and we shall live in a tent and it 4 be dangerus."
"I dn't care," said his wife. S they bught a big tent, camp beds and many ther things, and went ff t the 5 f Africa.
The first mrning, 6 Mr. Jnes tk his camera and left the tent, he 7 his wife a bell and explained t her, "If yu feel in 8 , ring this bell."
After a while, he heard the bell and came back quickly. "What's the matter?" he asked. " 9 ," said his wife, "I was nly trying the bell."
Mr. Jnes went ff, but after a while, the bell rang 10 . Mr. Jnes hurried back t the tent, but his wife said, "I'm 11 but I was cleaning ur tent, and I kncked the bell ver 12 ."
Mr. Jnes returned t his phtgraphing(拍摄) but sn he heard the bell. When he gt back t his 13 , the tent was burning and Mrs. Jnes was lying n the grund, 14 bld running frm a big cut n her shulder, "That's better!" said Mr. Jnes. "This time the bell has been used 15 !"
B.But C.Or D.S
B.miss C.marry D.care
B.advised C.reprted D.warned
B.ught C.can't D.shall
B.centre C.east D.west
B.until C.befre D.after
B.sent C.lent D.bught
B.surprise C.safety D.danger
B.Nthing C.N D.Nne
B.nce C.acrss D.away
B.srry C.tired D.right
purpse B.by design C.at last D.by mistake
B.huse C.camp D.ffice
B.n C.with D.fr
B.quickly C.crazily D.anxiusly
第二节 （共10小题;每小题1.5分,满分15分）
在空白处填入1个适当的单词或括号内单词的正确形式。
The histry f cmputer ①________(date) back t 1642 in France. At first, it ②________ (build) nly as a calculating machine, and later as an analytical machine that culd "think" lgically and prduce an answer which was quicker than any persn. Still later, the "universal machine" ③________ (build) in rder t slve mathematical prblems, which made cmputer huge! As the years have gne by, cmputers ④________ (make) smaller, quicker and cleverer. Up till nw, cmputers ⑤________ (cnnect) by netwrk and are able t help peple deal with the infrmatin which ⑥________ (need) and help cmmunicatin be tween peple arund the wrld. Since its birth, cmputers ⑦________ (always design) t serve the human race. As AI technlgy ⑧________ (develp) quicker and quicker, greater changes ⑨________ (take) place. Much mre practical use ⑩________ (put) int human daily life.
第三部分 写作（共两节,满分40分）
(满分15分)
请根据下面的内容提示,用英语写一篇物理实验报告。
注意:
1.词数80左右;
2.可适当增加细节,以使行文连贯;
3. 参考词汇:烧杯beaker 温度计thermmeter
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
（满分25分）
阅读下面材料,根据其内容和所给段落开头语续写两段,使之构成一篇完整的短文。
I grew up in a large family f twelve siblings(兄弟姐妹).We weren't pr by mst standards, but things were definitely tight fr us. My parents never shared their financial wrries. Instead, they chse t let us have a carefree childhd. But despite their cnsideratin, I knew, as children ften d, that there were times they went withut and that certain things my friends had wuldn't be available t me.
Back in thse days, ht lunch was a luxury fr the wealthier kids, and ht-lunch buyers sat separately frm the students wh brught cld lunch. My siblings and I brught lunch frm hme every day: thick slices f hmemade bread hiding ne scant slice f blgna, three atmeal ckies, and a small apple. We wuld lk n lngingly as the rich kids prudly sat dwn with their steaming plates f fried chicken r fish sticks and ptat puffs, cartns f cld milk, chilled peaches and a slice f cake.
I never said anything, but my first grade teacher, Mrs. Carus, must have seen the desire in my eyes. One day she quietly pressed a nte int my hand and whispered, "Give this t yur mther." I skipped hme and gave my mm the nte. She read it and smiled. "Well, Mrs. Carus said because f all yur hard wrk, she wants t buy yur lunch tmrrw." The next day, I prudly carried my tray f chicken fricassee acrss the cafeteria and tk my seat at the ht-lunch table. Hnestly, the fd wasn't as great as I had imagined, but I was pleased t be there and felt hnred t be a part f the grup.
One rainy day, Mrs. Carus asked me t stay after schl. My stmach instantly drpped t the flr. Surely, I must be in truble! Did she knw I hadn't finished my math sheet? Did she see me teasing Billy n the playgrund?
注意:
1.续写词数应为150左右;
2.请按如下格式在答题卡的相应位置作答。
After the ther students had left, Mrs, Carus said she was ging t finish her wrk and then drive me hme.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
I dn't knw why Mrs. Carus helped my family.
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
答案以及解析
第一部分 阅读
第一节
A.答案：1-3 CCD
解析：1.细节理解题。根据Jcelyn Bell Burnell段落中的then-student Bell discvered the first radi pulsars in 1967, when she was a PhD student at Cambridge. The Nbel Prize that recgnised this landmark discvery in 1974, 可知第一个射电脉冲星(radi pulsars)在1967年被发现, 它的发现被授予诺贝尔奖是在1974年。故选C项。
2.细节理解题。根据Lene Hau段落中的Often tpping Nbel Prize predictin lists, 可知莱娜•豪经常位居诺贝尔奖预测名单榜首, 她最有可能获诺贝尔奖。故选C项。
3.推理判断题。根据第一段总述中It's the first time in 55 years that a wman has wn this famus prize, but why has it taken s lng? We lk at five ther pineering female physicists—past and present—wh actually deserve the prize.可知唐娜▪斯特里克兰是五十五年来第一个获诺贝尔物理学奖的女性, 而文中介绍的五位女科学家都应该获得这个奖, 但由于各种原因未能获奖。故选D项。
B.答案：1-4.ACBD
解析：语篇解读:这是一篇介绍一种新型的可以找回自己丢失的东西的产品的文章。主要介绍了这种产品的功能、用法以及投放市场的远景等。
1.解析:细节理解题。根据第一段的“The Tile, a small square linked up t yur iPhne r iPad via Bluetth, lets yu see hw clse yu are t the missing item, within a 50-t 150-ft range.”可知The Tile 是一种通过蓝牙与你的iPhne或iPad连接起来的设备,让你看到你与你丢失的东西有多近。故选择A项。
2.解析:细节理解题。根据第一段的“The Tile, a small square linked up t yur iPhne r iPad via Bluetth, lets yu see hw clse yu are t the missing item, within a 50-t 150-ft range.”可知这种设备如果没有蓝牙就没法工作。故选C项。
3.解析:主旨大意题。 通读文章第二段,并根据该段的关键词prgram, link up等可以判断该段主要介绍如何使用这种产品。故选B项。
4.解析:推理判断题。 通读全文,并根据文章的最后一段推断可知,该文章应该是源自新闻报道。故选D项。
C.答案：1-4 BDDA
解析：1.推理判断题。第一段中, 作者先介绍了狗的鼻子有很多用途, 然后介绍科学家现在发明了可以做同样事情的电子鼻。由此可以推断, 先提及狗是为了引出电子鼻的话题, 故选B项。
2.词义猜测题。根据第二段中的Earlier mdels, hwever, have been bulky and new ne is inexpensive and small enugh t fit inside hand-held equipment.可知, 早期的电子鼻比较昂贵且"bulky", 新型的电子鼻则体积小巧, 可放入手持设备内, 新旧形成对比, 由此猜测bulky是"庞大"的意思, 故选D项。cmplex意为"复杂的"; fragile意为"易碎的"; handy意为"方便的"。
3.主旨大意题。第三段主要介绍了电子鼻可以同时检测到多种化合物极其轻微的气味, 故选D项。
4.推理判断题。根据最后一段中的"I fresee that such an bject culd add t the fine wrk dne by the dgs."可知, 斯蒂芬•泰勒认为电子鼻可以配合狗进行工作, 故选A项。
D.答案：1-4.BDAD
解析：语篇解读:本文是一篇研究报告。在夜间取自奶牛的牛奶含有大量的褪黑激素,能帮助人们入睡,减少焦虑。
1.解析:细节理解题。根据第四段的内容可知饮用夜间取的牛奶的老鼠比饮用白天取的牛奶的老鼠不那么活跃、不那么焦虑。故选B项。
2.解析:细节理解题。根据第六段中的"taking melatnin drugs has been suggested t thse wh are struggling t fall asleep at night"可知褪黑激素被用在安眠药中。故选D项。
3.解析:主旨大意题。根据第二段可知,饮用在夜间取自奶牛的牛奶能帮助人们入睡,减少焦虑。故选A项。
4.解析:篇章结构题。本文是通过提供研究结果来支持第一段所提出的中心论点。故选D项。
第二节
答案：①-⑤ CDABE
解析：①下文对几种社交媒体进行了详细的介绍，所以这里应该进行一个总的介绍，C项“一般而言，有六种不同的社交媒体形式。”符合语境，故选C。
②根据下文中的“This site allws peple t stay in tuch with friends, make new nes and jin cmmunities. Facebk is an example f this type.”可知这里的意思是“另外一种社交媒体是社交网站”，故选D。
③根据上文中的“Many peple like t play games n the Internet and, yes, there are scial media games as well. These games allw gamers t interact with each ther and play with r against ther gamers.”可知这里在谈论电脑游戏，A项“《魔兽世界》就是一个很好的例子。”符合语境，故选A。
④根据下文中的“It takes nly a few minutes t write a twitter pst，fr example.”可知这里指社交媒体的内容创作得很快，B项符合语境，所以选B。
⑤根据下文中的“But whatever yu might think, scial media is here t stay.”可知这里在表达对社交媒体的看法,E项“有些人认为社交媒体是好的，有些人认为社交媒体是不好的。”符合语境，故选E。
第二部分 语言运用
第一节
答案：1-5.BADAB; 6-10.CADBA; 11-15.BDCCA
解析：1.但是(but)他的妻子不愿意他离开她。前后句之间为转折关系,故选B。and和;but但是;r或者;s因此。
2.妻子不愿意他离开(leave)她。根据下句allwed her t g, t可知,选A。leave 离开;miss思念;marry结婚;care关心。
3.琼斯先生警告(warn)她:“天气非常炎热,我们将住在帐篷里,可能会非常危险。”丈夫警告妻子,非洲的生活非常简陋、不舒适,这是一种警告,故选D。infrm 通知;advise建议;reprt报道;warn警告。
4.天气非常炎热,我们将住在帐篷里,可能(may)会非常危险。存在危险是一种可能,故选A。may或许;ught理应;can't不可能;shall应该。
5.所以他们买了一个大号的帐篷,野营床垫,还有很多其他东西,然后出发来到了非洲中部(centre)。根据文章首句中的make a trip int the middle f Africa可知,选B。suth 南部;centre中部;east东部;west西部。
6.第一天早餐,在琼斯先生拿着相机离开帐篷之前(befre),他给了妻子一个铃铛。铃铛是琼斯先生在离开之前交给妻子的。故选C。while在……的同时;until直到……; befre在……之前;after在……之后。
7.他交给(give)妻子一个铃铛,还解释了理由。give 给;send寄送;lend借给;buy买。
8.如果你感到有危险(danger),就摇响铃铛。根据前文it may be dangerus可知,选D。hurry 匆忙;surprise惊讶;safety安全;danger危险。
9.“没什么(nthing),”他的妻子说,“我不过是试试这个铃铛。”根据nly trying the bell 可知,没有发生什么,故选B。smething某事;nthing没事;n不;nne一个也没有。
10.琼斯先生离开了,但是过了一会儿,铃声又(again)响了。这是铃声第二次响起,因此选A。again又,再;nce一次;acrss跨过;away离开。
11.对不起(srry),“我”在帐篷里打扫卫生,不小心打翻了铃铛。妻子不小心弄响铃铛,感到愧疚,故选B。happy高兴的;srry抱歉的;tired劳累的;right正确的。
12.妻子不小心(by mistake)打翻了铃铛。根据cleaning ur tent可知,妻子在打扫帐篷时打翻了铃铛,不是有意的,故选D。n purpse有意地;by design故意地;at last终于;by mistake无意地。
13.当他返回营地(camp)的时候,帐篷起火了。琼斯先生听到铃铛声后急忙返回营地,故选C。garden花园;huse房屋;camp营地;ffice办公室。
14.这时琼斯夫人躺在地上,血从肩头上的伤口流下来。with复合结构表示伴随。in 在……里面;n在……上面;with在……情况下;fr为了。
15.这一次铃铛的使用方法是对(crrectly)的。琼斯先生说遇到危险的时候摇响铃铛,所以他认为这一次使用铃铛是正确的。crrectly正确地;quickly快速地;crazily疯狂地;anxiusly焦急地。
第二节
答案：1. dates
2. was built
3. was built
4. have been made
5. have been cnnected
6. is needed
7. have always been designed
8. develps
9. will take
10. will be put
第三部分 写作
第一节
答案：
T find ut whether the temperature changes while ice is melting int water, we need t cnduct an experiment in physics. When preparing fr the experiment, we shuld get ice, ht water, a big beaker, a small beaker and a thermmeter ready.
First put sme ht water in a big beaker. Next put a small beaker filled with ice int the ht water and then put a thermmeter int the ice. After that, bserve the ice temperature when the ice begins t melt, and make a nte f it. At the same time, bserve the changes in the ice's temperature while it's melting. When all ice has melted int water, the temperature remains the same.
T cnclude, ice begins t melt when it is zer degree centigrade and the temperature desn't change until it melts cmpletely.
第二节
答案：
Paragraph1:
After the ther students had left, Mrs. Carus said she was ging t finish her wrk and then drive me hme. It was raining, and she knew I had a lng walk. We pulled up at my huse and she gt ut, taking ut a few bags n the prch.【高分句型一】 "Tell yur mm I had a few extra things she might want," she said. Then she drve away. Inside the bags were clthes, tys, and bks. That summer, Mrs. Carus invited us all t her hme. She gave us lemnade and sugar ckies, and we were amazed at the fancy fruits in her backyard.(老师帮助作者及家人)
Paragraph2:
I dn't knw why Mrs. Carus helped my family. Maybe she als grew up in a family that struggled. Maybe she knew what it was like t feel just a little less than everyne else.【高分句型二】Smehw, even with her quiet char-ity, she never made me feel ashamed. She just made me feel lved and imprtant. Thanks t her, I learned that I had just as much night as anyne t sit at the ht-lunch table. I dn't remember what Mrs. Carus lked like anymre, but I d remember hw she made me feel. I've never lst that feeling f being imprtant t smene and being prtected by her. After all these years, I'm still grateful t that wnderful teacher.(作者被老师帮助的感受)
实验目的
证明冰在融化的过程中温度不变。
实验用品
冰块,大、小烧杯,温度计,热水。
实验步骤
1. 在一个大烧杯中倒入热水;
2. 把装有冰块的小烧杯放入热水中,在冰块中插入温度计;
3. 观察冰块的温度变化,注意冰开始融化时的温度;
4. 观察冰融化为水的过程中的温度变化。
实验结果
冰全部融化为水的过程中温度不变。
实验结论
冰在零摄氏度时才开始融化。融化过程中温度不变。