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
查看答案
Which of the following can be inferred from the third stage of culture shock about visitors' activity？
A. Visitors begin to learn some native language.
B. Visitors begin to get around with people.
C. Visitors begin to replace aggression with humor.
D. Visitors begin to take a superior attitud
What CANNOT be inferred from the first paragraph？
A. Scientific experiments in the past three hundred years have produced many valuable items.
B. For three hundred years there have been people holding a hostile attitude toward science.
C. Modern civilization depends on science so man supports scientific progress unanimously.
D. Some people think three hundred years is not long enough to set back for critical appraisal of scientific method.
下列对原文的理解，正确的一项是：
A. 本文的写作目的是为了证明香格里拉就在云南丽江。
B. 洛克是为了“把灵魂融入这方水土”而来到丽江的。
C. 对“美洲被入侵，而不是被发现”的观点，本文作者是赞同的。
D. 本文认为，“香格里拉发现了洛克”，但香格里拉的确又是被洛克第一个发现的。
A．One month.B．One month and a half.C．Two months.D．Two months and a half.
A. One month.
B. One month and a half.
C. Two months.
D. Two months and a half.
微信支付 
支付宝支付