A.America uses only about 1.1 million lab animals per year.
B.Europe does not use mice and rats as lab animals at all.
C.Britain does not use as many lab animals as China does.
D.Japan has limited data on the number of lab animals used each year.
答案:D 正误判断题。第二段的最后一句提到日本和中国与美国的数据相比甚至更不全面,由此可推知日本对每年用于实验室动物的数据记录有限。
3.Which of the following is mentioned as an alternative to replace animal experiments?
A.Statistical studies.
B.Computer models.
C.DNA planted in animals.
D.Tissue from dead animals.
答案:B 细节理解题。根据第三段第二句中的内容可知可用“人体组织”和“电脑模型”来取代动物试验。
4.What usually happens to unsuccessful animal experiments?
A.They are not made known to the public.
B.They are made into teaching materials.
C.They are collected for future publication.
D.They are not removed from the research topic list.
答案:A 推理判断题。根据第三段中的倒数第二、第三句可知,科学家们只分享成功的试验,如果结果与假设不符,所做的工作将永不公开。由此可推断不成功的试验不会展示给公众。
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