试题与答案

下列说法正确的是( ) A.木块放在桌面上所受到的向上的弹力是由于木块发生微小形

题型:多选题

题目:

下列说法正确的是(  )

A.木块放在桌面上所受到的向上的弹力是由于木块发生微小形变而产生的

B.木块放在桌面上对桌面的压力是由于木块发生微小形变而产生的

C.用细竹竿拨动水中的木头,木头发生形变是由于木头受到了竹竿的弹力

D.悬挂着电灯的电线发生微小形变是由于电灯的重力作用而产生的

答案:

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