房室结内折返性心动过速不伴心功能不全选用( )
A．普萘洛尔B．毛花苷CC．奎尼丁D．胺碘酮E．维拉帕米
参考答案：E
（）成为国民经济支柱性产业被正式写入“十二五”规划纲要中。
David injured his leg playing football yesterday. Really?（）
A.Who did that?
B.What's wrong with him?
C.How did that happen?
D.Why was he so careless?
