止血药中有小毒的药物是()
A.三七
B.蒲黄
C.白茅根
D.艾叶
参考答案：D
The little boy is very kind. He always ____ his food ____others.
A．share; with
B．share; for
C．shares; with
D．shares ;for
哪种传染病在感染后隐性感染率低？（）
A.流行性出血热
B.乙型肝炎
C.伤寒
D.乙型脑炎
E.菌痢
