相对性二尖瓣狭窄有以下特点
A．为舒张中晚期杂音
B．常有拍击性S1
C．可有开瓣音
D．常有心房颤动
E．呈主动脉型，左室增大
参考答案：E
写比例，使它两个内项积是12．（至少写出2个）______、______．
----You just think of yourself! You kept me waiting for at least three hours．
----I am sorry that you _____ think so.
A．would
B．might
C．could
D．should
