2. 外语
  3. If a needle is thrown______on a sheet of paper ruled with lines, how often can it be expected to fall on a line?

If a needle is thrown______on a sheet of paper ruled with lines, how often can it be expected to fall on a line?

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问题 If a needle is thrown______on a sheet of paper ruled with lines, how often can it be expected to fall on a line?
选项 A、on purpose
B、with accuracy
C、at random
D、according to one’s own will
答案C
解析 习语搭配A．on purpose故意；B．with accuracy正确地；C．at random随意地；D．according to one’s own will按照某人自己的意愿；而本句意为：如果把一个针——扔在一张用尺子画上许多条线的纸上，那么这个针正落在一条线上的机率是多大?既然是问概率，那么应是随机地去做某事；因此答案应为C。
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