根据句意及汉语提示填空

1. I really enjoy the music. It sounds so _______(令人愉快).

2. I felt very _______(难过), because he hurt my dog.

3. Here's some _______(有用的) information about travel in Canada.

4. —Do you wash _______(碟子) at home?

    —Yes, but not often.

5. The teacher told us a funny story. All the students _______(笑了) happily.

通过采取技术和管理手段使事故发生后不造成严重后果或使后果尽可能减小，这是()。

A．事故预防

B．事故控制

C．安全管理

D．事故对策