题目内容
（请给出正确答案）
[单选题]
White smoke from a boiler may indicate __（）
A.a fractured tube
B.low fuel oil temperature
C.low fuel oil pressure
D.insufficient combustion air
答案
A、a fractured tube
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题目内容
（请给出正确答案）
A.a fractured tube
B.low fuel oil temperature
C.low fuel oil pressure
D.insufficient combustion air
答案
A、a fractured tube
更多“White smoke from a boiler may indicate __（）”相关的问题
第1题
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
第2题
Mrs. White is different from her friends who were______.
A．easily satisfied
B．not always hopeful
C．sure to succeed
D．not interested in free food
第3题
Smoking
Since 1939, numerous studies have been conducted to determine whether smoking is a health hazard. The trend of the evidence has been consistent and indicates that there is a serious health risk. Research teams have conducted studies that show beyond all reasonable doubt that tobacco smoking is associated with a shortened life expectancy.
Cigarette smoking is believed by most research workers in this field to be an important factor in the development of cancer of the lungs and cancer of the throat and is believed to be related to cancer of some other organs of the body. Male cigarette smokers have a higher death rate from heart disease than non-smoking males. Female smokers are thought to be less affected because they do not breathe in the smoke so deeply.
Apart from statistics, it might be helpful to look at what tobacco does to the human body. Smoke is a mixture of gases, vaporized chemicals, minute particles of ash and other solids. There is also nicotine, which is powerful poison, and black tar. As smoke is breathed in, all those components from deposits on the membranes of the lungs. One point of concentration is where the air tube and bronchus divides. Most lung cancer begins at this point.
Filters and low tar tobacco are claimed to make smoking to some extent safer, but they can only slightly reduce, not eliminate the hazards.
It is easy to determine whether smoking is hazardous.
A．Right
B．Wrong
C．Not mentioned
第4题
Personification is applied in ________.
A、When white men first effect contact with some unspoilt race of savages, they offer them all kinds of benefits, from the light of the Gospel to pumpkin pie.
B、One of the troubles about vanity is that it grows with what it feeds on.
C、Civilized life has grown altogether too tame, …
D、Any persons found advocating a preventive war should be condemned to two hours a day with these ingenious monsters.
第5题
The first English window was just a slit in the wall. (29) It was cut long, so that it would let in as much light as possible, and narrow, to keep out the bad weather. However, the slit let in more wind than light. This is why it was called "the wind's eye". The word window itself comes from two Old Norse words for wind and eye.
Before windows were used, the ancient halls and castles of northern Europe and Britain were dark and smoky. Their great rooms were high, with only a hole in the roof to let out the smoke from torches and cooking fires.
As time went on, people wanted more light and air in their homes. They made the wind's eyes wider so as to admit air and light. They stretched canvas across them to keep out the weather.
The first window was a______.
A．large hole in the roof
B．hole with canvas stretched across it
C．long and narrow slit in the wall
D．slit to let out the smoke from fires
第6题
There are a number of factors, which determine the onset of smoking, and these are largely psychological and social. They include availability of cigarettes, curiosity, rebelliousness, appearing thought, anticipation of adulthood, social confidence, the example of parents and teachers, and smoking by friends and older brothers and sisters.
It should be much easier to prevent children from starting to smoke than to persuade adults to give up the habit once established, but in fact this has proved very difficult. The example set by people in authority, especially parents, health care workers, and teachers, is of prime importance. School roles should forbid smoking by children on the premises. This role has been introduced at Summerhill School where I spent my schooldays.
There is, however, a risk of children smoking just to rebel against the rules, and even in those schools which have tried to enforce no smoking by corporal punishment there is as much smoking as in other schools. Nevertheless, banning smoking is probably on balance beneficial. Teachers too should not smoke on school premises, at least not in front of children.
In this passage the author puts an emphasis on ______.
A．the effect of smoking among children
B．the difficulty in preventing children from smoking
C．the reasons why children start smoking among children
D．the measures to ban smoking among children
第7题
The President gets about 4,000 letters every week. He answers everyone who writes to him on special White House Paper. But he doesn't need a lot of time for it. In fact, he only gives 20 minutes a week to looking at his personal correspondence. He has the most modern secretary in world to help him.
His computer, worth ￡ 800,000; which has its own room on the first floor of the White House. It has a bank of electronic pens which write like the President writes, in his favorite light blue ink. Each letter the President receives gets a number, according to the type of answer it needs. The pens then write the correct reply for it, according to the number. Each letter takes less than a second to write. A White House official said, "It's not important that the letters come from a computer. Each letter says what the President wants to say. "
______for a reply from the President.
A．You have to wait a long time
B．You have to wait at least one month
C．You only have to wait several days
D．You only have to wait a few weeks
第8题
Metaphor is applied in ________.
A、…satiety is a dream which will always elude you.
B、When white men first effect contact with some unspoilt race of savages, they offer them all kinds of benefits, from the light of the Gospel to pumpkin pie.
C、Dance halls, cinemas, this age of jazz are all, if we may believe our ears, gateway to Hell, and we should be better employed sitting at home contemplating our sins.
D、It is scarcely possible to exaggerate the influence of vanity throughout the range of human life, from the child of three to the potentate at whose frown the world trembles.
第9题
About 9:30 we went to the White House. It's【61】the public from ten【62】twelve, and there was a long line of people【63】to get in. We didn't have to wait very long, because the line moved pretty quickly.
The White House is really white. It【64】every year. And it seems very white, because it's got beautiful lawns【65】around it, with many trees and shrubs. The grounds【66】about four square blocks. I mean, they' re about two blocks long【67】each side.
Of course, we didn't see the whole building. The part【68】the president lives and works can not be visited by the public. But the part we saw was beautiful. We went through five of the main rooms. One of【69】was the library, on the ground floor. On the next floor, there are three rooms named【70】the colors that are used in them: the Red Room, the Blue Room, and the Green Room. The walls are covered with silk【71】There are【72】old furniture, from the time【73】the White House was【74】built. And everywhere there are paintings and statues of former presidents and【75】famous people from history.
(56)
A．made
B．took
C．did
D．set
第10题
• Only groups of 10 or more may request a tour.
• Requests must be submitted with a minimum of onemonth’s advance notice from the date of the tour. Notice of whether yourapplication is accepted will be given 10 days prior to the date requested. Alltours, even after they have been confirmed, are subject to cancellation due tosecurity interests.
• Tours are only conducted Tuesday through Saturdayfrom 7:30 am to 11:30 am.
To process your request for a tour, please contactour Washington office at (202) 224-5521 and provide the following information:
• Date(s) requesting.
• Security information for each person in your party,including: name as it appears on I.D. (I.D. required for ages 14 and up), dateof birth, social security number, country of origin, and citizenship (公民的身份).
• A home address and daytime and evening phonenumbers for the designated (指派的) leader of the group.
• A contact number while in DC for the designatedleader of the group.
After your request is accepted, our office willcontact you with further instructions.
1.This notice is to provide information about________.
A.application for a tour of the White House
B.the security system of the White House
C.scheduling of Washington DC tours
D.duties of a tour group leader
2.The White House is open to the public ________.
A.everyother day
B.on weekends only
C.fivedays a week
D.on weekdays only
3.Application for a group tour of the White Housemust be submitted ________.
A.exactly onthe date of application
B.any day between Tuesdayand Saturday
C.10 days before the date of the tour
D.atleast 30 days in advance
4.After your tour request has been confirmed,________.
A.you cansurely visit the White House that day
B.it isnecessary for you to start your tour immediately
C.itis still possible that your tour may be cancelled
D.youare still allowed to change your visiting date
5.It can be inferred from the passage that ________.
A.foreignersare less likely to be permitted to tour the White House
B.securityis the chief concern in scheduling White House tours
C.teenagersunder 14 are not allowed to visit the White House
D.separatetours can also be scheduled for individual visitors
第11题
If you live in an apartment, know the ways you can use to get out. Show everyone in the family these routes. Stress the importance of using stairways or fire escapes, not elevators.
From most homes and the lower floors of apartment buildings, escape through windows is possible. Learn the best way of leaving by a window with the least chance of serious injury.
In a home fire, windows are often the only means of escape. The second floor window sill is usually not more than 13 feet from the ground. An average person, hanging by the fingertips, will have a drop of about six to the ground. Of course, it is after to jump a short way than to stay in a burning building. Rolling away from the building when you land.
Windows are also useful when you are waiting for help. Often you'll be able to stay in the room for several minutes if you keep the door closed and the windows open. Keep your head low in the window to be sure you get fresh air rather than smoke that may have leaked into the room.
On a second or third floor, the best windows for escape are those which open onto a roof or balcony. From the roof or balcony, a person can either drop to the ground or await rescuer. Dropping onto cement or pavement might end in injury. Bushes, soft earth, and grass can help to break a fall. A rope ladder should be considered when the drop is too great.
In a town where the fire department acts quickly, it may be best to wait for rescuer. Close the doors and wait by an open window for help. Shout for help. Be sure to close the door before opening a window. Otherwise, smoke and fire may be drawn into the room by the draft.
From most homes you can escape a fire through the ______.
A．attic
B．garage
C．windows
D．balcony
