下列有关物理量与其单位匹配正确的是( ) A.质量——g B.反应速率——mol·L-1 C.摩尔质量——g·mol-1 D.气体摩尔体积——L·mol-1 答案:【解析】选ACD。根据排除法可知B选项错误,反应速率单位为mol·L-1·s-1或mol·L-1·min-1。I told
Sally how to get there, but perhaps I ________________ for her.
A.
had
to write it out
B. must have written it out
C. should have written it out
D. ought to write it out