5．What's the passage mainly about?

　　A．The importance of genetic engineering.

　　B．Ways to improve “mothers' milk”．

　　C．A cloned cow to produce human­like milk.

　　D．Advanced agricultural technology in Argentina.

　　答案：C　主旨大意题。根据科技资讯报道的特点，在文章第一段就会出现文章主题句，即 Scientists in Argentina have created the world's first cow with two human genes that will enable it to produce human­like milk.即可得出正确结论，故选C。

　　6．Which of the following can be best replace “more closely resemble” in Paragraph 4?

　　A．have more varieties than

　　B．be more similar to

　　C．have more nutrition than

　　D．be more different from

　　答案：B　词义猜测题。第四段内容介绍了中国培育了加入一个人类基因的牛可以被认为 “human­like”，那么阿根廷加入两个，足见是“更接近人乳”了，故选B。

　　7．What can be inferred from Cristina Kirchner's statements?

　　A．She was quite satisfied with the research done by the institute.

　　B．She considered it an honor to name the special cow.

　　C．She felt it improper to be named after the cow.

　　D．She refused to give a name to the cow out of self­respect.

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