试题与答案

汽车在一平直路面上匀速行驶,前方遇到一段泥泞的路面,导致汽车受到的阻力变大了,若

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题目:

汽车在一平直路面上匀速行驶,前方遇到一段泥泞的路面,导致汽车受到的阻力变大了,若汽车发动机的功率保持不变,经过一段时间后,汽车在泥泞的路面也能做匀速运动,则在图中关于汽车的速度随时间变化关系正确的图象是[ ]

A.

B.

C.

D.

答案:

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