蕲蛇治麻风疠毒与其何种作用有关（）
A.祛风止痒
B.祛风通络
C.以毒攻毒
D.舒筋活络
E.祛风止痉
参考答案：A, C
Are you afraid that your friend would laugh at you, or would not understand what you are _____? [ ]
A. going through
B. getting through
C. looking through
D. breaking through
多数鱼类背部发黑、腹部发白，其原因是( )。
A．长期进化形成的保护色 B．背部比腹部接受光线多，导致色素沉淀C．背部比腹部黏膜厚，吸收光线多 D．背部鱼鳞多，吸收光线多
