2. 外语
  3. Human beings are animals. We breathe, eat and digest, and reproduce the same life【C1】______common to all animals. In a biologica

Human beings are animals. We breathe, eat and digest, and reproduce the same life【C1】______common to all animals. In a biologica

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问题     Human beings are animals. We breathe, eat and digest, and reproduce the same life【C1】______common to all animals. In a biological laboratory rats, monkeys, and humans seem very much the same.
    However, biological understanding is not enough:【C2】______itself, it can never tell us what human beings are.【C3】______to our physical equipment the naked human body—we are not an【C4】______animal. We are tropical creatures,【C5】______hairless and sensitive to cold. We are not fast and have neither claws nor sharp teeth to defend ourselves. We need a lot of food but have almost no physical equipment to help us get it. In the purely physical【C6】______, our species seems a poor【C7】______for survival.
    But we have survived—survived and multiplied and【C8】______the earth. Some day we will have a【C9】______living on the moon, a place with neither air nor water and with temperatures that turn gases into solids. How can we have done all these things? Part of the answer is physical.【C10】______its limitations, our physical equipment has some important【C11】______. We have excellent vision and hands that can【C12】______objects with a precision unmatched by any other【C13】______. Most importantly, we have a large brain with an almost【C14】______number of neural【C15】______
【C2】
选项 A、On
B、With
C、For
D、By
答案D
解析 By itself为习惯用语，意为“独自地，单独地”。例如：The house stands by itself outside the village．这幢房子孤单地坐落在村外。所以D项为正确答案，即可排除A、B、C项。
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