影响中药“散气变味”的主要因素是（）
A.贮藏时间短
B.湿度过小
C.挥发油被氧化、分散或自然挥发的结果
D.空气当中氧气含量过高
参考答案：C
用动词的适当形式填空。
1. She likes musicians who (write) their own lyrics.
2. I prefer singing to _______(dance).
3. The boy _______(see) to play basketball just now.
4. Would you mind my_______(close) the window?
5. Be sure (see) this exhibition at the Lido Gallery.
观测程序总的原则是什么？
