2. 考研
  3. Human beings are animals. We breathe, eat and digest, and reproduce the same life (1)_____ common to all animals. In a biologica

Human beings are animals. We breathe, eat and digest, and reproduce the same life (1)_____ 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 (1)_____ common to all animals. In a biological laboratory, rats, monkeys, and humans seem very much the same.
    However, biological understanding is not enough: (2)_____ itself, it can never tell us what human beings are. (3)_____ to our physical equipment—the naked human body—we are not an (4)_____ animal. We are tropical creatures, (5)_____ 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 (6)_____, our species seems a poor (7)_____ for survival.
    But we have survived—survived and multiplied and (8)_____ the earth. Some day we will have a (9)_____ living on the moon, a place with neither air nor water and with temperatures that mm gases into solids. How can we have done all these things? Part of the answer is physical.
    (10)_____ its limitations, our physical equipment has some important (11)_____. We have excellent vision and hands that can (12)_____ objects with a precision unmatched by any other (13)_____ Most importantly, we have a large brain with an almost (14)_____ number of neural (15)_____.
    We have used this physical equipment to create culture, the key to our survival and success. If we live in the Arctic, we supply the warmth for our tropical bodies need (16)_____ clothing, shelter, and (17)_____ heat. If a million people want to live in a desert that supplies natural food for only a few hundred, we find water to grow food and (18)_____ deficits by transporting supplies from distant places. Inhabitants of our eventual moon colony will bring their own food and oxygen and then create an artificial earth environment to supply necessities. With culture, we can overcome our natural limitations.
    It was not always (19)_____ Our distant ancestors were just animals, faced with the limits of their physical equipment. They had no (20)_____ and lacked the physical Capacity to use it.

选项 A、On
B、With
C、For
D、By
答案D
解析 固定搭配。By itself 为固定用法，意思是"单独地、独自地"。
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