以下方组中无茯苓的是
A.异功散B.补中益气汤C.真武汤D.独活寄生汤E.败毒散
参考答案:B
We shouldn't ______ their mistakes. [ ]
A. to laugh
B. laugh at
C. laugh
D. to laugh at
一件工程,甲队单独做要8天完成,乙队单独做要12天完成。两队合做这件工程的一半,需要几天?