碘量法误差来源有两个，一个（）二是（）。
参考答案：碘具有挥发性易损失；I-在酸性溶液中易被来源于空气中氧化而析出I2
Read and choose. (读下面的对话，选择恰当的句子补充完整)
Doctor: Hello !
Susan: 例: (F)
Doctor: 1( )
Susan: My name is Sue.
Doctor: 2( )
Susan: I have a stomachache.
Doctor: 3( )
Susan: Not so often.
Doctor: 4( )
Susan: I will.
Doctor: 5( )
Susan: Thank you very much.
A. What's wrong with you?
B. What's your name?
C. Take this medicine two times a day?
D. Remember to wash your hands before meals.
E. Do you wash your hands before eating?
F. Hello!
百部除润肺止咳外，又能（）
A.降逆止呕
B.润肠通便
C.利水消肿
D.宽胸散结
E.杀虫灭虱
