应用在我公司有齿轮电梯上的上行超速保护装置的触发信号是限速器的（）开关。
参考答案：上行超速
-Why are you watching a football match?
-__________[ ]
A. It's exciting.
B. I have a football.
C. I'm at home.
D. I watch football matches at night.
Biology is __________ and the teacher makes me __________.[ ]
A. tired , boring
B. boring , tired
C. boring , boring
