2020-2021学年高中英语单元综合检测3Unit3Scienceandnature牛津译林版必修5
15页1、单元综合检测(三)Unit 3Science and nature(时间:100分钟;满分:120分).阅读理解(共15小题;每小题2.5分,满分37.5分)AIn 2001, scientists at Texas A&M University successfully cloned a cat for the first time, but this copy cat is no mirror image of the original.Copy Cat (CC) was the first cat ever cloned.In 2001, researchers at Texas A&M University created the clone from the DNA of a calico cat(三色猫) named Rainbow after a failed attempt at cloning a dog.Interestingly, Rainbow and Copy Cat are different in many ways.Rainbows coat is br
2、own, and white, while CCs is gray and white; Rainbow is shy, but CC is outgoing and curious. The differences in the two cats indicate that identical DNA wont necessarily create similar appearances or personalities because there are many other factors that contribute to both surface characteristics and temperament(性情)CC has since gone on to have three healthy kittens via the natural method, and the research that led to her creation became the foundation for a Californiabased pet cloning company c
3、alled Genetic Savings & Clone, Inc.However, the cat cloning project caused criticism from animal welfare groups, which pointed out that millions of cats are killed in shelters each year due to pet overpopulation.They argued that the large sums of money spent on creating more cats could be put to better use providing homes for strays.There are also objections to the cloning process itself.Many people consider cloning cruel, as it is a process that can lead to deformities and other problems, which
4、 is evident in the fact that many clones die within months or even days of creation.Much to the delight of animal welfare advocates, after cloning five cats in total, Genetic Savings & Clone shut down in 2006.The reason for the companys close was its inability to make its cloning technology affordable and thus accessible to mainstream consumers.【语篇解读】本文是一篇说明文。文章主要讲述的是克隆猫所带来的令人惊讶的结果以及大众对她的看法。1What is the best title of the passage?ACloned Catsa Surprising Development on TechnologyBCloned CatsCloni
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