英语必修 第三册Unit 3 The world of science课后练习题

这是一份英语必修 第三册Unit 3 The world of science课后练习题，共4页。
（2019吉林长春外国语学校高一下月考）
Crime happens every day，but peple aren’t the nly victims f illegal activities. There are als animals. Thugh animals can’t tell the plice fficers what they’ve suffered these are sme f the hardest cases slved.
As we all knw, pachers can make a lt f mney by selling meat, fur and ther parts f prtected animals. As the animals becme rarer, their parts becme mre valuable. S pachers earn even greater rewards fr their cllectin f prtected species. In the past few years, the price f ivry has risen t abut $850 per kilgram. A piece f ivry can smetimes weigh 11 kilgrams r mre.
Nw, scientists are fighting back. It is knwn that DNA plays a big part in slving human crime. Like fingerprints, DNA is unique t every persn. S by examining DNA in bld r hair, the plice can recgnise criminals and victims.
If the wrlds pached victims culd talk, they wuld prbably thank these scientists fr their wrk.
1. The authr uses the example f ivry t shw that ________.
A. ivry is the mst expensive part f an elephant
B. paching is a very cmmn activity in the wrld
C. pachers make a healthy prfit frm their illegal activities
D. pachers treat the prtected animals cruelly
2. What is the authr’s attitude twards the scientists wrk?
A. Critical. B. Dubtful. C. Uninterested. D. Appreciative.
3. The third paragraph is mainly abut ________.
A. hw t examine DNA f an animal
B. why DNA is unique t every persn
C. the imprvement f DNA technique
D. hw DNA technique helps the plice
Ⅱ.七选五
（2019江苏南京江宁区高一下期末）
Studies shw that human beings and cats have been living tgether fr abut 9, 500 years. 1 Dgs are dmesticated, meaning they have been trained t d what peple want them t d.
As cat wners knw well, cats d nt bey humans in the same way dgs d. 2
As a result, many peple have cme t think that maybe cats simply d nt understand human language. A reprt in the scientific jurnal Nature shws that cat understand human beings well enugh t recgnise their wn names. The reprt describes experiments that invlved having peple say fur wrds that were similar t a cat’s name. Each wrd had the same number f syllables as the name and sme f the same sunds. The cats seemed t lse interest after the speaker said a few f the wrds. 3 The cats mved their ears r turned their heads when they heard their names. They als mved their feet r bdies very little—nt a surprising result.
4 These animals reacted just as much t the wn names.
“I think many cat wners feel that cats knw their names, r the wrd ‘fd’. 5 ” says Sait, wh is a cat wner. The researchers hpe that the findings frm their study will help bth cats and peple.
A. Then the persn said the cat’s name.
B. In fact sme scientists claim that cats have trained us t take care f them.
C. They added that perhaps cats culd learn wrds t warn them f dangerus things r places.
D. Dgs have lived with humans lnger than cats.
E. The study was carried ut by fur researchers.
F. But until nw, there is n scientific evidence t back that up.
G. In anther part f the experiment, peple said the names f the cats staying in a cat café.
答案：
I.语篇解读：本文是一篇说明文。犯罪活动每天都在发生，但人并不是非法活动的唯一受害者，受害的还有动物。如今警方通过检测血液或毛发中的DNA可以识别出罪犯和受害者。
1.C 细节理解题。根据第二段中的 S pachers earn even greater rewards fr their cllectin f prtected species.可知作者运用象牙的例子是为了说明偷猎者从他们的非法活动中获得了巨大的利润。故选C。
2.D 推理判断题。根据最后一段 If the wrld’s pach victims culd talk，they wuld prbably thank these scientists fr their wrk.可知作者对科学家们的工作是欣赏的。故选D。
3.D 主旨大意题。根据第三段中的 Like fingerprints DNA is unique t every persn. S by examining DNA in bld r hair，the plice can recgnise criminals and victims.可知第三段主要是为了解释DNA是如何帮助警方的。故选D。
II.语篇解读：本文是一篇说明文。一篇报道显示，猫能很好地理解人类，能够认出自己的名字。该报道描述了研究人员用猫做的一系列实验，希望他们的研究结果对猫和人都有帮助。
1.D 本文讲述猫的习性，文章在开头段落将猫与狗作比较，引出话题，故该空承接上一句 Studies shw that human beings and cats have been living tgether fr abut 9，500 means.（研究表明人类和猫在一起生活了大约9，500年。而狗和人类一起生活的时间比猫长。）。故选D。
2.B 由上文 As cat wners knw well，cats d nt bey dgs d.可知，猫不像狗那样服从人类，事实上，一些科学家声称猫已经训练我们去照顾它们。故选B。
3.A 本段讲述了实验的过程，包括让人们说出四个与猫的名字相似的单词。讲话者说了几个词后，猫似乎失去了兴趣。根据设空处下文 The cats mved their ears r turned their heads when they heard their names.可知，当人说了猫的名字，它们会动耳朵或转头。故选项A符合。
4.G 本段讲述了另一个实验过程，根据后文中的 reacted just as much t their wn names可知，当人们说出在猫咪咖啡馆里的猫的名字时，它们的反应（次数）跟听到自己的名字（的次数）一样多，故选G。
5.F 根据设空处前一句 I think many cat wners feel that cats knw their names，r the wrd ‘fd’.可知，Sait认为很多养猫的人觉得猫知道它们的名字或者“食物”这个词。选项F（但直到现在也没有科学依据支持那一点。）承接上文，符合文意。故选F。