我国公路运输中整批货物的计费重量是()。
A.千克
B.吨
C.100千克
D.10千克
参考答案:B
— Can you keep an eye on my bag? I just want to use the bathroom.
— _____ It'll be safe with me.[ ]
A. Sure, why not?
B. Take it easy
C. Go ahead.
D. Not at all.
桥梁上部的承力台座由混凝土筑成,应有足够的强力、刚度和稳定性,钢横梁受力后,挠度不能( )。
A.大于2mm
B.小于2mm
C.大于4mm
D.小于4mm