与猩红热有关的主要致病物质是()
A.M蛋白
B.透明质酸酶
C.链激酶
D.链道酶
E.致热外毒素
参考答案:E
--Jim, put the things away and tidy(整理)your room.
-- Well, but I have ____ work to do, Dad.
A.many
B.a lot
C.lots of
D.too many
心室收缩时颈静脉有搏动,可见于
A.高血压病B.严重贫血C.三尖瓣关闭不全D.主动脉瓣关闭不全E.甲状腺功能亢进症