生牡蛎除平肝潜阳外,还能()刺蒺藜除平肝疏肝外,还能()
A.软坚
B.纳气
C.利尿
D.凉血
E.明目
参考答案:A,E
计算-(-3a2b3)4的结果是( )
A.81a8b12
B.12a6b7
C.-12a6b7
D.-81a8b12
You’ll be late __________ you don’t get up now.
A.if
B.before
C.until
D.after