问题
多项选择题
停运时判断双进双出磨煤机是否抽空,说法正确有()。
A、磨煤机料位指示以至最低;
B、磨煤机电流已至空载电流;
C、磨煤机噪音很大,电耳料位指示最大;
D、磨煤机进口与出口温差迅速缩小;
E、就地观察一次风喷口无煤粉喷出。
答案
参考答案:A, B, C, D, E
停运时判断双进双出磨煤机是否抽空,说法正确有()。
A、磨煤机料位指示以至最低;
B、磨煤机电流已至空载电流;
C、磨煤机噪音很大,电耳料位指示最大;
D、磨煤机进口与出口温差迅速缩小;
E、就地观察一次风喷口无煤粉喷出。
参考答案:A, B, C, D, E
Passage One
According to the speaker, how does the price of an electronic keyboard compare with the price of a piano
A.The electronic instrument is much more expensive.
B.The electronic instrument is slightly more expensive.
C.The piano is slightly more expensive.
D.The piano is much more expensive.