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【多选题】
设函数f(x)的定义域为(1,4),且在(1,2)U(3,4)上单调减少,同时在(2,3)上单调增加,则( ).A.
函数f(x)在x=3处取得极小值
B.
函数f(x)在x=3处取得极大值
C.
函数f(x)在x=2处取得极小值
D.
函数f(x)在x=2处取得极大值
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举一反三
【单选题】During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?
A.
Reduce the pumping rate by closing the deck filling valve
B.
Close all overflow valves
C.
Place 5 gallon containers under all flange connections in the fuel line
D.
Reduce the pumping rate and sound tanks frequently as the level rises
【单选题】Upon completion of fueling a gasoline driven vessel it is necessary to ______.
A.
keep ports，doors，windows，and hatches closed
B.
start engines immediately
C.
ventilate before starting engine
D.
None of the above
【简答题】Fueling station
【单选题】Fueling results in the collection of waste oil in drip pans and containers. Which is an approved method of disposing of the waste oil?
A.
Draining it overboard when the vessel gets underway
B.
Placing it in proper disposal facilities
C.
Adding sinking agents and discharging it into the water
D.
Mixing it with dispersants before draining it overboard
【单选题】Which statement is FALSE concerning precautions during fueling operations?（）
A.
All engines，motors，fans，etc. should be shut down when fueling
B.
All windows，doors，hatches，etc. should be closed
C.
A fire extinguisher should be kept nearby
D.
Fuel tanks should be topped off with no room for expansion
【单选题】In the United States, the fueling stations offering for filling natural gas have reached to ______.
A.
1,300
B.
500
C.
1,500
D.
2,500
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