A.do
B.to do
C.done
D.doing
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A.update
B.finish
C.outdated
D.expire
A.Any surge occurs
B.Any surge occurred
C.Should any surge occur
D.Should any surge occurring
A.Were there loss of energy by friction
B.Since there be loss of energy by friction
C.Were there no loss of energy by friction
D.Should be no loss of energy by friction
A.The smoother；the greater
B.Smoother；less
C.The rougher；the greater
D.rougher；greater
A.in which
B.on which
C.by which
D.from which
最新試題
Diesel engine air start system check valves are opened by （）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）
The main purpose of port State control is not to（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Which of the following items don’t belong to dock repair works?（）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
The treatment of the fuel oils involves storage, heating, filtering and（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）