光缆短期允许拉伸力应小于()。
A.1200N
B.1350N
C.1500N
D.1600N
参考答案:C
三个相同的杯子中各装有适量的水,把质量相同的实心铜块、铁块、铝块依次放入甲、乙、丙三个杯中后,水面高度相同,则原来水面最高的杯子是________(ρ铜>ρ铁>ρ铝>ρ水)
Look! If we had begun to do the work yesterday morning, we _______ ourselves just like them.
A.would have enjoyed
B.were to enjoy
C.should enjoy
D.would be enjoying