球菌性口炎的病因是（）
A.细菌感染
B.真菌感染
C.自身免疫功能缺陷
D.变态反应
E.病毒感染
参考答案：A
_____, I can't express myself in words. [ ]
A. So long as I am fond of
B. Now that I am fond of
C. Much as I am fond of her
D. As I am fond of very much
微球载体材料（）。
A．氟利昂
B．磷脂类
C．白蛋白
D．硬脂酸镁
E．羊毛脂
