《2019-2020学年高中英语 Unit 2 Cloning Section Ⅰ Warming Up & Reading练习 新人教版选修8》由会员分享，可在线阅读，更多相关《2019-2020学年高中英语 Unit 2 Cloning Section Ⅰ Warming Up & Reading练习 新人教版选修8（7页珍藏版）》请在金锄头文库上搜索。
1、Section Warming Up & Reading.用括号内所给单词的适当形式填空1His explanation was not_(reason), so all of us didnt accept it.2From the appearance, we can not tell the_(differ) between the twins.3After his_(retire), he settled down in a remote village.4Grey decided to move to the countryside and his mother made no_(o
2、bject) to it.5What I want is_ (exact) this one.6We cant_ (undertake) the work for the time being.7It is difficult _(obtain) reliable evidence.8We are playing a trick on a man who keeps _(bother) me.9His own pride_(forbid) him to ask Toms help.10Will they be able_(resist) the temptation to buy?答案1rea
3、sonable2.difference3.retirement4objection5.exactly6.undertake7.to obtain8bothering9.forbids10.to resist.阅读理解阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项。AThe news that researchers have used cloning to make human embryos for the purpose of producing stem cells may have some people wondering if it would ever be
4、 possible to clone a person. Although it would be immoral, experts say it is likely biologically possible to clone a human being. Since the 1950s when researchers cloned a frog, scientists have cloned dozens of animal species, including mice, cats, sheep, pigs and cows.With mice, researchers are abl
5、e to use thousands of eggs, and conduct many experiments, to work out these problems. “Its a numbers game，” said Dr. Robert Lanza, the chief scientific officer at a biotech company. “But with primates (灵长类动物), eggs are very precious, and it is not easy to get them to conduct experiments.”In addition
6、, researchers cant simply apply what theyve learned from cloning mice or cows to cloning people. Cloning an animal requires that researchers remove proteins that are necessary to help cells divide. In mice, this isnt a problem, because the embryo that is created is able to make these proteins again.
7、 But primates arent able to do this, and researchers think it may be one reason that attempts to clone monkeys have failed.Whats more, cloned animals often have different kinds of abnormalities. These abnormities are common because cloned embryos have just one parent rather than two, which means tha
8、t a process known as “imprinting (印记)” does not occur properly in cloned embryos.“Problems with imprinting can result in extremely large embryos, which leads to problems with blood flow for the baby，” Lanza said. “The extremely high rate of death and the developmental abnormities from cloning makes
9、cloning people immoral. Its like sending your baby up in a rocket knowing theres a 5050 chance that its going to explode.”1What can we learn from Paragraph 1?AAnimal cloning is illegal.BHuman cloning is possible.CHuman embryos may have new functions.DAnimal embryos can be used for medicine.2How does
10、 the author develop Paragraph 2?ABy making comparisons.BBy showing processes.CBy offering analyses.DBy using statistics. 3.How were the experiments on cloning monkeys?AThey have solved the problem with proteins.BThey have been applied to human cloning.CThey were successful.DThey were in trouble.4How
11、 does Lanza feel about human cloning?AIt is risky. BIt is practical.CIt is beneficial. DIt is promising.答案与解析语篇导读：本文是说明文。文章介绍了动物克隆及人类克隆面临的难题。1B细节理解题。根据第一段中的experts say it is likely biologically possible to clone a human being可知，人体克隆具有可能性。2A写作手法题。第二段比较了老鼠和灵长类动物做克隆实验的不同点。3D推理判断题。根据第三段中的primates arent
12、able to do this, and researchers think it may be one reason that attempts to clone monkeys have failed可推断，对猴子进行的实验遇到了困境。4A推理判断题。根据末段中的Its like sending your baby up in a rocket knowing theres a 5050 chance that its going to explode可推断，人体克隆有很大的风险。B(2019年高考课标全国卷I)As data and identity theft becomes more
13、 and more common, the market is growing for biometric(生物测量)technologieslike fingerprint scansto keep others out of private espaces. At present, these technologies are still expensive, though.Researchers from Georgia Tech say that they have come up with a lowcost device(装置)that gets around this probl
14、em: a smart keyboard. This smart keyboard precisely measures the cadence(节奏)with which one types and the pressure fingers apply to each key. The keyboard could offer a strong layer of security by analyzing things like the force of a users typing and the time between key presses. These patterns are u
15、nique to each person. Thus, the keyboard can determine peoples identities, and by extension, whether they should be given access to the computer its connected toregardless of whether someone gets the password right.It also doesnt require a new type of technology that people arent already familiar with. Everybody uses a keyboard and everybody types differently.In a study describing the technology, the researchers had 100 volunteers type the word “touch”four times using the smart keyboard. Data collected from the device could be used to
