希恩(Sheehan)综合征属于（）

A.下丘脑性闭经

B.神经性闭经

C.子宫性闭经

D.卵巢性闭经

E.垂体性闭经

This company used to enjoy international reputation, ( )

A．doesn't it

B．does it

C．didn't it

D．used it