试题与答案

小船在静水中的速度是v0,现小船要渡过一条河流,渡河时小船向对岸垂直划行,已知河

题型:选择题

题目:

小船在静水中的速度是v0,现小船要渡过一条河流,渡河时小船向对岸垂直划行,已知河中心附近流速增大,由于河水流速的变化,渡河时间将(  )

A.增大

B.减小

C.不变

D.不能确定

答案:

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参考答案:胃虚有热之呃逆

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