原式=-a8•(-b7a7)•1b6
=ab.
故答案为:ab
----- I’m sorry . I ________ at you the other day .
----- Forget it. I was also a bit out of control of myself.
A.shouldn’t shout
B.mustn’t shout
C.shouldn’t have shouted
D.mustn’t have shouted
下列哪个方剂中同时包含龙骨、牡蛎两味药()
A.羚角钩藤汤
B.镇肝息风汤
C.天麻钩藤饮
D.朱砂安神丸
E.大定风珠