You should frequently compare drum-mounted and remote-reading water level indicators（） between these have contributed to failures because of overheating through shortage of water, when a boiler was being oil-fired.
1、Before you start an engine in a compar
Before you start an engine in a compartment，it’s MOST important to（）.Acheck the flame arresterBcheck the fuel tankCcheck the batteryDventilate the bilge
Why should you back up a duplicated tablespace after a TSPITR is complete？（）  ...
What should you do？（）AABBCCDD
What should you do to reduce spanning-tree protocol BPDU traffic during extended periods̳...
5、What should you do if you have transmi
What should you do if you have transmitted a distress call a number of times on channel 16 and have received no reply?（）ARepeat the message...
6、You （）him so closely; you should have
You （）him so closely; you should have kept your distance．Ashouldn’tfollowBmustn’tfollowCcouldn’t have been followingDshouldn’t have been following