简述健康促进可采用的方法。

A. stand aside
B. stand down
C. stand by
D. stand in

A. Hard economic times in France.
B. People"s Christmas wish.
Changes of people"s attitude towards gift-giving.
D. Eco-friendly products.

A. 过氧化物
B. 碱类
C. 浓酸
D. 水分