2. 外语
  3. We should take good care of our eyes ______. Having two eyes, instead of one, is particularly useful for ______.

We should take good care of our eyes ______. Having two eyes, instead of one, is particularly useful for ______.

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问题 We should take good care of our eyes ______.
Having two eyes, instead of one, is particularly useful for ______.
选项 A、seeing at night
B、seeing objects far away
C、looking over a wide area
D、judging distances
答案D
解析 见第5段首句。
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