功善滋补肝肾，明目，乌发的药物是( )
A．沙参
B．车前子
C．麦冬
D．女贞子
E．西洋参
参考答案：D
It was the second time that I_______of the changes of the timetable .
A．have been informed
B．had been informed
C．have informed
D．had informed
从口腔临床交叉感染的病原学考虑，最危险而又最典型的感染是
A．原虫感染
B．病毒感染
C．细菌感染
D．真菌感染
E．以上全都是
