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ry, genetic engineering contributed little to increase the life span of healthy people. 参考答案： C 文章回顾上个世纪的医学概况并展望了本世纪医学发展前景，提出生物工程技术可能带来的利与弊以及作者的态度。 Do onto others as they would do onto you: 这句话和中国的谚语“己所不欲，勿施于人”同义。A指出20世纪以前的医疗技术残忍而无效，是错误的； B，抗生素和疫苗应该是在一战后被发明的； D, 文中所指的贡献小的技术不是genetic engineering；C，抗生素和疫苗的出现极大地增长了美国人均寿命，是正确的。----------------------------------------2Which of the following statements best reflect the author?s attitude towards clone? A.He is expecting that clone can be used to perfect human being.B.He does not advocate applying clone to human being.C.He remains neutral, neither for, nor against.D.We cannot infer the author?s attitude from this passage. 参考答案： B 从文章第四段第一句可以看出作者不赞成克隆人这一行为。“advocate”是“支持，拥护”的意思。----------------------------------------3The sentence “We should also draw a line, however fuzzy...” means A.there should be a line to distinguish medicine and morality.B.we should make law to prevent the scientists from using clone to alter human nature.C.we should make a boundary in order to use the genetic engineering properly.D.we should clarity certain medical problems by drawing lines. 参考答案： C “draw a line” 是划清界限的意思，从文章第四段第二句可以看出，作者主张利用基因工程技术来治疗人类的疾病，反对利用这种技术来改变人作为一个独立个体的特征，在这两者之间划清界限。----------------------------------------4The word “hominid” (in paragraph 3, line one) means A.a collection of animal and its ancestors.B.a collection of man and animals.C.all of the creatures.D.a family of man and its ancestors. 参考答案： D “hominid”是人科动物的意思，即人类。 A是指动物及其后代； B是人类和动物的集合； C是指所有的生物，包括人类、动物、植物等。----------------------------------------5Why does the author t
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