Over the past two decades, the popularity of the bicycle as a mean of transportation and recreation has increased tremendously i

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问题 Over the past two decades, the popularity of the bicycle as a mean of transportation and recreation has increased tremendously in the United States.

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答案mean--means

解析 译文:过去的二十年间,自行车作为一种交通和娱乐工具在美国大肆风行。
分析:考查名词辨析。mean作名词,表示“中间;平均数”,用于此不符合句意。此处表示“方法,手段,工具”,应该用以s结尾的名词means。
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