2. 外语
  3. Few animals besides monkeys have hand-like paws. The monkey, like man, has an opposable thumb —— that is, it can place its thumb

Few animals besides monkeys have hand-like paws. The monkey, like man, has an opposable thumb —— that is, it can place its thumb

admin2009-04-15  32
问题     Few animals besides monkeys have hand-like paws. The monkey, like man, has an opposable thumb —— that is, it can place its thumb opposite its other fingers. By pressing its first finger against its thumb a monkey can pick up things as tiny as a flea(跳蚤)。 Because other animals lack this thumb, it is difficult for them to pick up small things and carry them.
    The monkey’s ability to grasp rice with its paw often leads to its capture. Hunters put some rice inside a coconut(椰子果), leaving a hole in the shell of the nut. The monkey has no trouble sliding its paw through the hole. But it can’t draw the paw out while it is holding the rice with its paw.
    Since it is often too stupid or greedy to open its hand, the monkey is unable to free itself from this simple trap (圈套).
选项 A、Paws with fingers.
B、Paws with thumbs.
C、Paws without fingers.
D、Paws without thumbs and fingers.
答案B
解析
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