气压计是由（）部分。（）部分，（）部分组成。
参考答案：感应；传递放大；自记
- Did you see a man in black pass by just now?
- No, sir. I _______ a newspaper.[ ]
A. read
B. was reading
C. would read
D. was reading
电气火灾监控系统的适用场所有哪些?
