由β溶血性链球菌产生的扩散因子（）
A.M蛋白
B.脂壁酸
C.红疹毒素
D.链激酶
E.透明质酸酶
参考答案：D
My grandmother __________ in Yangzhou. She was born there and has never lived anywhere else.
A．lived
B．lives
C．was living
D．will live
心脏Austin-flint杂音见于
A．二尖瓣狭窄
B．二尖瓣关闭不全
C．主动脉瓣狭窄
D．主动脉瓣关闭不全
E．肺动脉瓣关闭不全
