试述预施药物、防止染病的常用方法。
参考答案：
1）口服。
2）佩带。
3）烟熏。
4）粉身。
5）悬挂。
Fei Junlong’s wife and his child ________ to see him off before the launch, but they failed because of the rules.
A．hope
B．had hoped
C．have hoped
D．were hope
中心性浆液性脉络膜视网膜病变多见于（）
A.10～20岁
B.60～70岁
C.20～45岁
D.70岁以上
E.45～60岁
