What does blowing tubes accomplish?()
- AEliminates unburned fuel oil residues from the firebox
- BIncreases boiler efficiency
- CFlushes away mineral deposits inside the water tubes
- DCleans soot deposits from the inside of the stack
What does blowing tubes accomplish?()
What does the man mean?A He got there in only five minutes.B He has a good reason for being late.C He is used to waiting for the woman.
2、What does“meteorological experts”mean
What does“meteorological experts”mean in paragraph three?_______ApredictorsBwitchCweathermanD a kind of Englishman
3、What does ECDIS stand for?()
What does ECDIS stand for?()AElectrical Chart Display and Indication SystemBElectronic Chart Display and Information systemCElectric Chart Display and Information SystemDElectronic Chart Display and Indicating system
What does your father do?()AHe is cleaning the streetBHe is fortyCHe is a farmerDHe is all right
5、What does “evel-luffing” accomplish du
What does “evel-luffing” accomplish during crane operations().AIt prevents the load from swinging when the boom level is adjustedBLess power i...
What does “DOD” stand for?