具有耳毒性的是（）
A．磺胺嘧啶
B．链霉素
C．红霉素
D．苯巴比妥
E．水杨酸钠
参考答案：B
He likes eating very much, ______ he doesn't like cooking at all. [ ]
A. and
B. on
C. but
D. because
冻疮好发于（）
A.肢端
B.耳廓
C.鼻尖
D.头皮
