非同步电除颤用于（）
A.房颤
B.阵发性室速
C.室上速
D.房扑
E.室颤
参考答案：E
因式分a3+ab2+2a2b=______．
— ______.
— He is a shop assistant. [ ]
A. Who is the man?
B. Where is your father?
C. What does your father do?
D. Is your father a shop assistant?
