变压器瓦斯保护是保护()。
A、开关
B、变压器
C、母线
参考答案:B
—May I have a bottle of orange?
—________. [ ]
A. Certainly, here you are
B. Oh, it doesn't matter
C. Thank you
D. Yes, you may
由于再热蒸汽对金属的冷却作用小,所以再热器一般布置在水平烟道或尾部竖井中()