仓储工作不创造(),但创造价值。
A、价格
B、使用价值
C、交换价值
D、交换价格
参考答案:B
— What was the trouble with you the day before yesterday?
— When I practiced running, my strength _____ and I fell onto the ground.
A.gave away
B.gave in
C.gave off
D.gave out
一列特快列车4小时行使640千米,它的速度是______.