A.central air condition system
B.high velocity system
C.low velocity system
D.single duct system
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A.mechanical energy
B.heat energy
C.potential energy
D.kinetic head
A.backwards
B.forwards
C.upward
D.downwards
最新試題
Flame failure in an automatically fired auxiliary boiler can from a/an （）
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.
Cold weather starting of a diesel engine may be made easier by（）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）