夹子是我们生活巾经常使用的物品,图12给出了用手捏开和夹住物品

夹子是我们生活巾经常使用的物品,图12给出了用手捏开和夹住物品时的两种情况.下列说法中正确的是 

A.当我们用手将其捏开时.它是费力的

B.当我们用其夹住物品时,它是费力的

C.无论用手将其捏开还是夹住物品时.它都是省力的

D.无论用手将其捏开还是夹住物品时,它都是费力的        

答案

B

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