5.Who believe that foods from cloning are safe to eat?
A.Most Americans.
B.An advisory committee.
C.Critics.
D.The FDA.
解析:选D。细节理解题。文章开头说,美国食品和药品管理局告诉公众,克隆动物制品可以安全食用,其后代也能安全食用。
6.It can be inferred from the last paragraph that ________.
A.cloning has much in common with genetic
B.not every cell taken from a donor animal can grow into a genetic copy
C.the donor animal should be a female one
D.cloned animals grow faster than normal ones
解析:选B。推理判断题。最后一段说,“如果这个过程成功的话”,怀孕的动物的孕期就会自然成熟。由此判断选B,这个过程也有失败的时候。
7.Which of the following is true about foods from cloning?
A.They come from the sexually reproduced offspring of cloned animals.
B.The food from first-generation cloned animals is very expensive.
C.Only FDA has the right to sell the food.
D.They will be sold mixed with those from naturally bred animals.
解析:选A。推理判断题。第七段说,克隆动物的肉食不是来自克隆动物本身,而是来自有性繁殖的后代,克隆动物将被用做繁殖动物,以传递优良素质。
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