用药后30min内不宜吃东西或饮水的剂型是
A．舌下片
B．泡腾片剂
C．滴丸
D．缓、控释剂
E．咀嚼片
参考答案：A
When Mr. Smith retired, his son ______ the business from him. [ ]
A. took out
B. took down
C. took in
D. took over
写出下列反应的文字表达式，并注明反应类型．
（1）氢气燃烧______；______．
（2）实验室加热氯酸钾制氧气______；______．
