高中英语人教版选修8练习：Unit 2 Cloning含解析.docVIP

高中英语 Unit 2 Cloning [导语]　从1998年中国科学院动物研究所首席科学家、动物克隆与受精生物学学科带头人陈大元首次正式提出克隆大熊猫到现在，整整20年过去了，陈老仍然执着于此。然而保护大熊猫，究竟要不要通过克隆的方式呢？ China has been exploring every possible means of saving giant pandas，one of the worlds most endangered species，from becoming extinct，even if it means resorting to(诉诸) cloning them. Chen Dayuan，a senior scientist who specializes in cloning at the Institute of Zoology in the Chinese Academy of Sciences，introduced the idea of performing cloning techniques on giant pandas in 1998. Using initial funding of 100，000 yuan，Chen successfully produced blastocysts(胚泡) by transplanting the somatic nucleus from sample pandas into the egg cells of rabbits. “Those who are against cloning have made their voices heard throughout the research project on cloning giant pandas.Some people believe cloning goes against nature，but it is actually a pioneering technology.If successful，it is a way to save endangered animals，”Chen said. Some scientists take a different view.“While I agree that research on cloning is meaningful，it is inappropriate to use giant pandas in this type of experiment.The number of pandas is limited and human beings have yet to master knowledge about pandas pregnancy.Cloning would do little to save the species，”said Wang Dajun，a researcher at the School of Life Sciences，Peking University. In response，Chen said that he would continue his research. [词海拾贝] 1．endangered adj.快要绝种的 2．technique n．技巧，手法 3．transplant v．移植 4．pregnancy n．怀孕 [问题思考] 1．Do you think pandas can be saved by cloning？Why? _______________________________________________________ 2．Why are some scientists against cloning pandas? _______________________________________________________ 答案：1.略 2．Because they think cloning goes against nature. Ⅰ.为单词选择正确的释义 1．commercial　　　　 A．装饰 2．undertake B．最初的，开始的 3．breakthrough C．假定；设想 4．procedure D．媒介；手段；工具 5．altogether E．程序；步骤；手续 6．medium F．规则；规章；法规 7．assumption G．商业的；贸易的 8．regulation H．着手；从事；承担 9．initial I．缺点；不利条件 10．drawback J．总共；完全地