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单选题
Before attempting to put out a class “C” fire involving an electric-driven centrifugal pump, you should FIRST （）.
A
insulate your shoes
B
ground the fire hose
C
secure its power supply
D
start the fire pump
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The class of fire on which a blanketing effect is essential to extinguish the fire isA.Class 'A'B.Class 'B'C.Class 'C'D.Class 'D'
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现有： class Flow { public static void main（String [] args） try { System. out .print （"before"） ； doRiskyThing （ ） ； System.out.print （"after "） ； } catch （Exception fe） { System.out.print （"catch"） ； } System. out .println （ " done"） ； } public static void doRiskyThing（） throws Exception{ // this code returns unless it throws an Exception }} 可能会产生哪两项结果 ？（） A、 before catchB、 before after doneC、 before catch doneD、 before after catch
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单选题In the event of a flame failure in an auxiliary water-tube boiler, you must（）A
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单选题An example of class "A" fire is a/an （）.A
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单选题There is a fire in the crew’s quarters of your vessel. You should（）.A
ventilate the quarters as much as possibleB
prepare to abandon shipC
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单选题What’s the attitude of many old senior officers for a minor fire?（）A
They would like to call out all hands out for itB
They would rather handle themselves, then call out all handsC
They prefer to put it out by themselvesD
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考题
单选题Would you like to join me for a quick lunch before class? （） but I promised Tom to go out with him.A
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I like itC
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单选题______ after the explosion happened in a factory in Dehui, Jilin on June 3rd, a lot of fire- men rushed to put out the fire.A
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SoftlyC
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单选题public class X { public static void main（String [] args） { try { badMethod（）； System.out.print（“A”）； } catch （Exception ex） { System.out.print（“C”）； } finally { System.out.print（“B”）； } System.out.print（“D”）； } public static void badMethod（） { throw new Error（）； } } What is the result？（）A
ABCDB
Compilation fails.C
C is printed before exiting with an error message.D
BC is printed before exiting with an error message.E
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