RM80清筛车采用的传动轴的伸缩量为()。
A、110mm
B、120mm
C、130mm
D、140mm
参考答案:A
—We all had a lot of fun at the barbecue yesterday. Pity you weren’t there.
—I really should have gone with you but I _____ on some remaining problems.
A.worked
B.was working
C.would work
D.would have worked
一本书小丽每天看15页,12天就看完了,如果一天看20页,需要看几天?