当井口区发生火灾或温度高于设定值70℃时，井口区（）
A、PSH压力开关
B、PSL压力开关
C、FSD回路
D、易熔塞动作
参考答案：D
根据句意及首字母或图片补全单词
1. Don't play the d______.It's too noisy.
2. In China,the famous music of v______ is Liang Zhu.
3. Beauty! May I know your e-mail a______?
4. We can hear wonderful m______ in shopping center.
5. We usually s______ in the river in summer.
6. —Can you p______?
—Yes,look at the picture on the wall.
7. She likes to d______ to the muisc.She's a good dancer.
8. I want to j______ the club,because I can play the g_____.
9. He can’t play chess ______ (good).
SF31904电动轮停车制动器锁死的原因湿什么？
