治疗流脑首选磺胺嘧啶(SD)是因为
A．血浆蛋白结合率高
B．血浆蛋白结合率低
C．对脑膜炎双球菌敏感
D．细菌产生抗药性较慢
E．持续时间长
参考答案：B
Only ______ the painting _______ decide whether it is worth buying.
A．that he sees; can he
B．that does he see; he can
C．when he sees; can he
D．when does he see; can he
士林在中添加羊毛脂是为了（）。
