试述化妆品的保存
参考答案：
1）防污染
2）防晒、防热、防冻、防潮、防挤压，应放在通风，阴凉，干燥处，可以保质到它的保质期
Tim didn't_______money for a bus, so he _____ home. [ ]
A. have some ; walk
B. had any ; walked
C. has some ; walk
D. have any ; walked
用百分表测量平面时，（）与平面应垂直。
