碘剂治疗甲亢用于（）。
A.甲亢危象、妊娠
B.Graves病
C.应激
D.甲亢危象、术前准备
E.甲亢危象、甲亢性心脏病
参考答案：D
He has worked in the city _______ three years ago while his wife has been here______only one month.
A．since , for
B．since, since
C．for, since
D．for, since
凭证式国债由财政部发行，发行和交易可以实现无纸化。( )
