造成六氟化硫设备低气压报警、闭锁异常的原因有哪些？答

A. 制动装置
B. 反转自锁装置

A. I failed my French test.
B. It doesn’t matter.
C. Nothing’s wrong with him.
D. I don’t think I can

A. Thank you
B. All the same.
C. Me. too.
D. The same to you

A. what is the person over there.
B. who’s talking over there.
C. what are they doing.
D. which is that