病原体通过母体传给子代称为
A．水平传播
B．家庭传播
C．血源性传播
D．垂直传播
E．间接传播
参考答案：D
— You won the first prize in the Physics competition.
— _________. I made several terrible mistakes.
A．I think so
B．You must be joking
C．You are welcome
D．It doesn’t matter
局部麻醉时，常用的术前用药是（）
A.东莨菪碱
B.哌替啶
C.硫喷妥钠
D.苯巴比妥钠
E.地西泮
