如图甲,起重机的钢索将重物由地面吊到空中某个高度,其重物的速度v随时间t变化的图像如图乙所示,此过程中钢索拉力的功率P随时间t变化的图像可能是图丙中的() A . B . C . D . 答案:A
- Would you help me clean the windows?
- ________.I’d rather water the floor.
[ ]
A.Nothing but that
B.Don’t mention it
C.Anything but that
D.With pleasure