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（请给出正确答案）
A.To prevent internal damage from local overheating
B.To ensure the fuel nozzles are flushed clean
C.To clear the smoke stack
D.To let the waste heat boiler reduce it’s rate of steam generation
答案
A、To prevent internal damage from local overheating
更多“Before shutting off the fuel supply to stop a medium or high-speed diesel engine, why is it necessar…”相关的问题
第1题
Which italicized part in the following sentences indicates REASON？
[A] Stepping off the pavement, he was knocked down by the bus.
[B] He went out shutting the door behind him.
[C] Being sick, I stayed at home.
[D] She hurried into office, carrying documents in hand.
第2题
A.putout
B.break off
C.put off
D.break out
第3题
A.polished up
B.polished off
C.pointed out
D.polished with
第4题
A.throw away
B.strip off
C.straighten up
D.keep back
第5题
A、It’s sure that
B、Make sure that
C、Certain that
D、I certain that
第6题
ing.
A、in
B、out of
C、before
D、front
第7题
A.How come
B.How dare
C.How about
D.How long8
第8题
A.relight the boiler immediately to prevent loss of steam pressure
B.relight the fire off the brickwork as long as the bricks are cherry red
C.purge the furnace of any combustible gases before attempting to relight the fire
D.speed up the feed pump to prevent dry firing when the burner flame is reestablished
第9题
Concrete
Another thing to remember in connection with concrete is that you are not allowed very much leeway for errors in either measurements or location. Once you have a solid mass of concrete set in place, it is going to stay there. You have a difficult job ahead of you if you try to remedy a mistake. Make very sure, before you fill the form, that everything is where and how you want it.
There are numerous rules regarding the proper mixing handing, and finishing of concrete, but the essential one concerns the amount of water to use. The less water in the mix, the less the finished job will shrink. The less water used, the harder and more enduring the job after it has set.
The amateur concrete worker is plagued with two desires. One is to use enough Water to have the concrete nice and soft and easy to push around. You have been warned against that. The second is to take off the wooden forms too early, to see what the job looks like. That is really fatal. If the forms are stripped off too soon, while the concrete is still green, two things are likely to happen—you are almost sure to break off corners or edges, and you are likely to cause a major crack or defect in the body of the work. An excellent rule is to wait until you are sure the concrete is properly' hardened, and then wait another day before removing the forms.
The best title for this selection would be:________.
A．Concrete and Its Uses
B．Rules for Working with Concrete
C．Concrete, the Homeowner's Joy
D．Concrete, a Test of Character
第10题
听力原文： In public speaking, the watch word is preparation. Most of us tend to put things off, at least occasionally. It's so easy to put things off especially those things we do not look forward to doing. So if the speaking engagement is several weeks off, we may feel that we still have plenty of time. But as the day draws closer, we begin to panic. Don't let this happen to you. Start preparing as soon as you're given or accept the speaking assignment. You have much to do and to do it right will take time. How much better your speech will be and how much better you'll feel if you have taken the time to do it right! When you are prepared, you have gathered the needed data, determined what is appropriate to the listener's understanding and acceptance levels, organized the ideas so they flow logically, selected examples and other supports for your ideas and made them interesting to your listeners, developed a great opening that you know will capture the attention of even the daydreamers in your audience checked out the room where you'll be speaking and requested any feasible changes you wish in the set-up of the room If you are prepared, you are confident that you can best convey your message to your listeners. If you waited until a few days before your presentation to begin to prepare, or worse, yet, the day before, no doubt you'll be anxious and with good reason. And now there is not enough time to engage in more than a superficial attempt. Both you and the audience will feel uncomfortable, like retirement planning. It is never too early to start preparing for your presentation. So, start preparing right away.
(33)
A．Confidence.
B．Preparation.
C．Informativeness.
D．Select appropriate materials.
第11题
(1). The office hour is from 10.30 to 3 on Sunday.
A、 Right
B、Wrong
(2). You can find information about where to eat from the office.
A、 Right
B、Wrong
(3). The bus tour starts at 2 o’clock every day.
A、 Right
B、Wrong
(4). You are not allowed to get off the bus before the tour ends.
A、 Right
B、Wrong
(5). This is a telephone message.
A、 Right
B、Wrong
