用所给单词的适当形式填空.

1. Can you give me your _______(explain) for your absence?

2. During the Spring holidays there are many _______(culture)activities.

3. In America, we often greet people by _______(shake) hands or hugging.

4. I'll call you as soon as I _______(get to) New York.

5. Could you tell me some special customs that _______(not find) in Chinese culture?

电烧伤的严重程度取决于（）

A.接触时间

B.电流强度

C.电流性质

D.电流径路

E.周围环境