2. 外语
  3. It was 10 years ago, on a warm July night, that a newborn lamb took her first breath in a small shed in Scotland. From the outsi

It was 10 years ago, on a warm July night, that a newborn lamb took her first breath in a small shed in Scotland. From the outsi

admin2015-03-13  44
问题     It was 10 years ago, on a warm July night, that a newborn lamb took her first breath in a small shed in Scotland. From the outside, she looked no different from thousands of other sheep born on【C1】______farms. But Dolly, as the world soon came to realize, was no【C2】______lamb. She was cloned from a single cell of an adult female sheep,【C3】______long-held scientific dogma that had declared such a thing biologically impossible.
    A decade later, scientists are starting to come to grips with just how different Dolly was. Dozens of animals have been cloned since that first lamb—mice, cats, cows and, most recently, a dog—and it’s becoming【C4】______clear that they are all, in one way or another, defective.
    It’s【C5】______to think of clones as perfect carbon copies of the original. It turns out, though, that there are various degrees of genetic【C6】______. That may come as a shock to people who have paid thousands of dollars to clone a pet cat only to discover that the baby cat looks and behaves【C7】______like their beloved pet—with a different-color coat of fur, perhaps, or a【C8】______different attitude toward its human hosts.
    And these art just the obvious differences. Not only are clones【C9】______from the original template(模板)by time, but they are also the product of an unnatural molecular mechanism that turns out not to be very good at making【C10】_______ copies. In fact, the process can embed small flaws in the genes of clones that scientists are only now discovering.
A)abstract I)nothing
B)completely J)ordinary
C)deserted K)overturning
D)duplication L)separated
E)everything M)surrounding
F)identical N)systematicaly
G)increasingly O)tempting
H)miniature
【C5】
选项
答案O
解析 空格处位于It’s后面，to think前面，故空格处应该填形容词。根据后文中提到的“但结果却是……”可知，tempting“吸引人的，诱人的”符合此处文意，即这种想法是非常吸引入的。备选项中其他形容词均不符合句意，故均排除。
转载请注明原文地址:https://www.kaotiyun.com/show/V0h7777K
0

大学英语六级

相关试题推荐
随机试题
最新回复(0)