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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 pum
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Class B fires are best extinguished by smothering, i-e（）.
A . deprival of oxygen
B . removal of heat
C . spraying of water
D . injecting of soda-acid
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A class "C" fire would most likely occur in the （）.
A . engine room bilges
B . main switchboard
C . paint locker
D . rag bi
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A class "D" fire would be considered as burning （）.
A . wood
B . oil
C . electrical equipment
D . magnesium
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How many subnetworks and hosts are available per subnet if you apply a /28 mask to the 210.10.2.0 class C network?（）
A . 30 networks and 6 hosts.
B . 6 networks and 30 hosts.
C . 8 networks and 32 hosts.
D . 32 networks and 18 hosts.
E . 14 networks and 14 hosts.
F . None of the above
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Which two statements are true if a NullPointerException is thrown on line 3 of class C？（）https://assets.asklib.com/images/image2/2018080115102280471.jpg
A . The application will crash.
B . The code on line 29 will be executed.
C . The code on line 5 of class A will execute.
D . The code on line 5 of class B will execute.
E . The exception will be propagated back to line 27.
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A large oil fire is best extinguished with（）
A . soda acid
B . foam
C . CO
D . sand
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If ignited，which material would be a class B fire?（）
A . Magnesium
B . Paper
C . Wood
D . Diesel Oil
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0il fires are best extinguish by（）.
A . cutting off supply of oxygen
B . removing the fuel
C . cooling below the ignition temperature
D . spraying with water
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A fire of escaping liquefied flammable gas is best extinguished by（）.
A . cooling the gas below the ignition point
B . cutting off the supply of oxygen
C . stopping the flow of gas
D . interrupting the chain reactio
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Halon extinguishers used on a class C fire should be directed at the（）.
A . base of the equipment
B . top of the equipment
C . power source
D . source of the fire
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Which of the listed materials would be considered as a bunting class "C" fire?（）
A . Fuel oil
B . Wood
C . Celluloid
D . Electrical insulatio
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A class "C" fire would occur in （）
A . bedding
B . pipe insulation
C . paint
D . a generator
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A class "B" fire would most likely occur in the （）.
A . main switchboard
B . engine room bilge
C . breathing compartment
D . electric fresh water transfer pum
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A class C fire would be burning（）.
A . fuel oil
B . wood
C . celluloid
D . electrical insulatio
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A class "C" fire is burning （）.
A . diesel oil
B . magnesium
C . dunnage
D . electrical insulatio
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Which portable fire extinguisher should be used on a class C fire on board a vessel?（）
A . Carbon dioxide
B . Water (stored pressure)
C . Foam
D . Carbon tetrachloride
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The class of fire on which a blanketing effect is essential to extinguish the fire is （）.
A . class A
B . class B
C . class C
D . class D
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Which one from A,B or C is the best choice in formal style?Pat and ____ are w时ting a novel.
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We are all in Class 1. Some of my c_________ go to school together（一起）
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all inspections are carried （）conscientiously to the best of our knowledge and ability. A、in B、to C、out D、away
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Women are quite often competent drivers, but they are very seldom consistently first class. At best they are a mild hazard, at【C1】______ potentially lethal.
A wise male driver will always give them plenty of roads and still be on the lookout for the【C2】______ to happen.
This【C3】______ has nothing to do with their lack of ability to cope with the【C4】______ complexities of the vehicles; it is due to an inherent【C5】______ which, in certain other circumstances, may be highly desirable,【C6】______ which, behind the wheel, is deadly. It is their【C7】 for talking. Women together in a car yield【C8】 ______ this need and when they talk they look into each other's faces. Simple words are【C9】______
It is necessary for them to see the expression which【C10】______ the words and so read the meaning the words left unsaid.【C11】______ two women in the front of a car repeatedly【C12】______ each other's attention from the road, and four represent an incredible danger【C13】______ the one nominally driving the car feels it necessary to see and hear not only what her companion is talking about but also, such is her【C14】______ , what those in the back are discussing in case it is anything【C15】______ which she can inject and add opinion, or in the hope of collecting fresh fuel to feed other fires on later【C16】______ .
Another factor is that women seldom use the driving mirror except for【C17】______ purposes, after which its position gives the driver little【C18】______ of the state of the road behind.
A final important factor that seems to lie at the back of feminine attitudes to driving is that 【C19】______ few women have the feel for a machine that so many men have; the satisfaction of a slick change down means nothing to them. The coordination between the various maneuvers (机动), an operation【C20】______ gives many men a boost of pride, is only a momentary lapse in their concentration on the topic in hand.
【C1】
A．least
B．most
C．last
D．worst
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Click the Exhibit button. Given:Which two statements are true if a NullPointerException is thrown on line 3 of class C？ （）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/900591de4611848eaa661230b23f7c01.jpg' />
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/096a8f1a86972212e5c4d4c53f88ec71.jpg' />
A.The application will crash.
B.The code on line 29 will be executed.
C.The code on line 5 of class A will execute.
D.The code on line 5 of class B will execute.
E.The exception will be propagated back to line 27.
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Vocabulary and Structure Directions: There are a number of incomplete sentences in this part. For each sentence there are four choices marked A）, B）, C） and D）. Choose the ONE that best completes the
A．accompany
B．accomplish
C．accommodate
D．account
