A.plastic
B.metal
C.stainless steel
D.copper
您可能感興趣的試卷
你可能感興趣的試題
A.turn off power first
B.turn on power first
C.with a test pen in hand
D.tell C/E
A.ammeter
B.voltmeter
C.synchroscope
D.A+B+C
A.either；or
B.neither；nor
C.such；that
D.so；that
A.that
B.when
C.if
D.whether
A.rise, rise also
B.rise, drop
C.drop, rise
D.drop, drop also
最新試題
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
Cold weather starting of a diesel engine may be made easier by（）
The treatment of the fuel oils involves storage, heating, filtering and（）
Diesel engine air start system check valves are opened by （）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
The ISPS Code consists of a mandatory section-Part A, which shows（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）