According to Paragraph 5 the author's descrip
问题详情
According to Paragraph 5, the author"s description of Ames" test include all of the following EXCEPT that ______.
A.he had known that bacteria were sensitive to substances that cause mutation
B.he had been aware that carcinogens would probably be mutagens
C.he conducted a carcinogen test by using bacteria
D.he tried to repeat a carcinogen test hailed by all scientists in the field请帮忙给出正确答案和分析,谢谢!
参考答案
正确答案:D
解析:本题为正误判断题,考查考生根据文章中所给定的信息,判断什么信息是正确的,什么信息是错误的,什么信息是文章中没有提到的。题目问:根据第五段,作者对Ames实验的描述没有包括下面哪一项?第五段最后四行“Armed with the knowledge that bacteria are sensitive to substances that cause mutation, and that carcinogens were likely to be mutagens, Ames developed a carcinogen test using bacteria. The Ames test was hailed as a major scientific development and is now used worldwide”说明Ames在做致癌实验以前,已经知道细菌对产生突变的物质敏感(选项A),他也知道致癌物质有可能是诱导有机体突变的物质(选项B)。有了这些知识之后,他用细菌做了致癌物质实验(选项C)。他的实验被认为是重大的科学突破而受到欢迎,现在在全球被广泛应用。而不是像选项D所说的那样,他重复一个被本领域科学家所赞扬的致癌物质实验,所以选项D为正确答案。