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In a two-stroke engine, there are always a series of openings known as （）, and in some circumstances, there are also openings known as （）, in the part of the cylinder liner.
A . scavenging air ports；exhaust ports
B . inlet ports；scavenging air ports
C . scavenging air ports；inlet ports
D . exhaust ports；inlet port
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If there were a fire in the bunker tanks, you would（）
A . close the vent
B . pump out the tank
C . activate the fixed CO
system
D . cut off the heating coil
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If there are （） in the repair work, please come to our duty engineer at once.
A . any problem
B . some problem
C . any problems
D . some problem
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If there are a number of survivors in the water after abandoning ship，they should（）.
A . tie themselves to the unit so they won't drift with the current
B . form a small circular group to create a warmer pocket of water in the center of the circle
C . send the strongest swimmer to shore for assistance
D . form a raft by lashing their life preservers together
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There are some back-up satellites in the event of failure. If the operational satellite is out of work,（）.
A . communications in the whole system will stop
B . the global system will be damaged
C . the back-up one will take its place
D . the whole system will not work
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If there is a red sun in the morning, bad weather is on the way.
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If you don’t know how many seats you should prepare, you ask the guest \How many people are there in your party？\
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In MLA style, the editor of a collection of essays, stories, and so on is identified before the title; ed. here means “editor,” and eds. is used if there are two or more editors.
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There are a few people in the room, ____?
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If there are fewer initializers than elements in the array, the remaining elements are __________.
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In the US, poll after poll has shown a majority in favour of animal experimentation, even without statements about its value. Why is opinion in Britain so different？ I think that there are two reasons.
The first is the success of antivivisection campaigners in lampooning animal research as outdated, intentionally cruel, "bad" science, which achieves nothing. All drugs and procedures developed with the help of animal tests are said to be dangerous. The occasional failure of animal testing to identify a dangerous drug is developed as an argument for abandoning safety tests involving animals altogether--with no mention of the terrible human suffering that this would cause. They say that "alternative" methods already exist for all animal experiments, but the fact is that the law specifically forbids animal use if there is any alternative.
The second reason is that scientists and doctors have failed to oppose such misrepresentation. In the early 1990s, animal rights campaigning in the US was met with much more forthright defense, not only by the major scientific societies, funding agencies and medical organizations, but also by the US government.
To be positive, there are many encouraging features of the New Scientist poll. Interestingly, the public seems to employ the same kind of utilitarian philosophy that underpins the law in Britain--weighing potential benefits against the species involved (thus, monkeys are more "valuable" than mice) and the likelihood of suffering.
Clearly, people in Britain do not recognize the essential link between animal research and testing and the medical treatments that they receive. Only 18 percent of those who had taken (or had a close family member who had taken a drug prescribed for a serious illness realized that the drug had been tested on animals, as all drugs are. Obviously, a large majority of those surveyed believe that they can happily benefit from medical treatment without taking advantage of animal research. No wonder so many people oppose it when asked the straight yes/no question.
The views of the public must be respected. But this poll tells us that, while they are open to persuasion, their reaction is based on misunderstanding. The responsibility for providing honest evidence for the public lies not just with those who use animals in their research, but with other scientists who depend on that work. It lies with the doctors who benefit from animal research, with the pharmaceuticals and biotech industries, and the medical charities and funding age, les whose work would be crippled without it. But most of all, responsibility rests with government, which should cultivate serious and transparent debate between those of different opinion, and provide the public--especially young people--with the honest evidence they need and deserve.
In the first sentence of Paragraph 3, "such misrepresentation" refers to ______.
A．the idea that other methods can be substituted for animal research
B．the claim that animal experiment is intentionally cruel
C．the belief that all drugs developed with animal tests are dangerous
D．the fact that scientists and medical organizations support animal experimentation
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听力原文： The hand has been a symbol through the ages and in many cultures There are hundreds of expressions-and combinations of words using hand in the English language Let us examine some of the expressions that use hand.
To get a hand in is to begin a job, to begin to know something about it. When we learned completely, it will be easy for us. We will be able to do it hands down. If we do the job well, we may end up with the upper hand. That means to be in control or to have gained complete understanding of a situation. On the other hand, if the situation gets out of hand then, it is out of control. Then we may have to hand it to someone, to let someone else take over the business. It is time for us to wash our hands, to end it up completely. You can also lend a hand to someone but without really giving up your hand. You lend a hand when you help someone. You offer them a helping hand. If someone is kind enough to lend us a hand then we surely do not want to bite the hand that feeds us. We do not want to repay his kindness by treating him badly.
The expression "to end up with the upper hand" means ______.
A．to begin a job
B．to be in control
C．to be out of control
D．to take over the business
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He gave us a （） stay at home on the National Day, because there were crowds everywhere in the city.
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听力原文： The hand has been a symbol through the ages and in many cultures. There are hundreds of expressions and combinations of words using hand in the English language. Let Us examine some of the expressions that use hand.
To get a hand in is to begin a job, to begin to know something about it. When we learned completely, it will be easy for us. We will be able to do it hands down. If we do the job well, we may end up with the upper hand. That means to be in control or to have gained complete understanding of a situation. On the other hand, if the situation gets out of hand then, it is out of control. Then we may have to hand it to someone, to let some- one else take over the business. It is time for us to wash our hands, to end it up completely. You can also lend a hand to someone but without really giving up your hand. You lend a hand when you help someone. You offer them a helping hand. If someone is kind enough to lend us a hand then we surely do not want to bite the hand that feeds us. We do not want to repay his kindness by treating him badly.
The expression "to end up with the upper hand" means ______.
A．to begin a job
B．to be in control
C．to be out of control
D．to take over the business
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Most of us go through life adding______to knowledge, polishing a concept here or there, doing an experiment, contributing a few leaves—or, if we are lucky, a twig—to the tree of knowledge.
A．impartially
B．impassably
C．incrementally
D．melodiously
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There are many types of reports. A report is simply 【B1】 of something that has happened. The commonest are 【B2】 We get them in newspapers, over radio and 【B3】 television. Sometimes 【B4】 also show us newstreel.
The main purpose of a newspaper 【B5】 provide news. If you 【B6】 a newspaper closely, you will find that there are all types of news. accidents, floods, fires, wars, sports, books, etc. The news 【B7】 everything that 【B8】 to people and their surroundings. Sometimes there are news items which are very 【B9】
The big 【B10】 bold words above the news items 【B11】 headlines. Their purpose is to 【B12】 attention so that people will buy the newspaper because they want to read 【B13】 of the news.
A news report is usually very short, 【B14】 when it is about something very important, but it 【B15】 a lot of information. It is also 【B16】 in short paragraphs. The first paragraph is in 【B17】 a summary of the news item. It gives all the necessary information: what, when, where, how, why. The other paragraphs give 【B18】 of the subject. There may also be interviews 【B19】 people. The words actually spoken by them are within inverted commas.
Often there are photographs to go 【B20】 the news to make it more interesting.
【B1】
A．a count
B．an account
C．an accident
D．an incident
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There are a lot of（)in the gym.
A．A.swimming pools
B．B.classes
C．C.trainers
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听力原文：Once you have arrived in our country, beware those professional pickpockets. Here's how to protect yourself. Women whose bags are hanging in front of them are tricky for the thieves, as there isn't a blind side. If you want make it even harder, use a bag with handles rather than a strap. For men, one of the best places to keep a wallet is in the back pocket of tight trousers. You'll feel any attempts to move it. Another good place is in the buttoned-up inside pocket of a jacket. There's just no way in. Even better, keep wallets attached to a cord or chain that is fastened to a belt.
______
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Are you worried by the rising crime rate？ If you are, then you probably know that your house, possessions and persons are increasingly in danger of suffering from the tremendous rise in the cases of burglary and assault. Figures indicate that there is an ever-increasing crime rate but it is only too easy to imagine "it will never happen to me". Unfortunately, statistics show that it really can happen to you and, if you live in a large city, you run twice the risk of being a victim.
Fortunately, there is something definite which you can do. Protect Alarms can help to protect your house with a burglar alarm system which is effective, simple to operate and easily affordable. You must re-member that possessing a burglar alarm is no indication that your house is packed with valuable possessions. It quite simply indicates to unwelcome visitors that yours is one house they will not break into easily, so they carry on to an unprotected house where their hob is made a lot easier.
Send now for our free leaflet telling you how we can protect your house quickly, easily and cheaply. Complete and tear off the slip below and post it to us. Postage is free. Alternatively, televice. It costs nothing to find out about Protect Alarms.
Anyone who takes an interest in the crime rate will, according to the text, be aware that ______ .
A．more burglars are being caught that ever before
B．people have more possessions to worry about nowadays
C．burglars are more at risk that they used to be
D．homes are more likely to be broken into nowadays
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In what now seems like the prehistoric times of computer history, the earth's postwar era, there was quite a wide-spread concern that computers would take over the world from man one day. Already today, less than forty years later, as computers are relieving us of more and more of the routine tasks in business and in our personal lives, we are faced with a less dramatic but also less foreseen problem. People tend to be over-trusting of computers and are reluctant to challenge their authority. Indeed, they behave as if they were hardly aware that wrong buttons may be pushed, or that a computer may simply malfunction.
Obviously, there would be no point in investing in a computer if you had to check all its answers, but people should also rely on their own internal computers and check the machine when they have the feeling that something has gone wrong.
Questioning and routine double-checks must continue to be as much a part of good business as they were in pre-computer days. Maybe each computer may provide; it should not be seen as a substitute for fundamental thinking and reasoning skills.
What is the main purpose of this passage？
A．To look back to the early days of this passage.
B．To explain what technical problems may occur with computers.
C．To discourage unnecessary investment in computers.
D．To warn against a mentally lazy attitude towards computers.
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In 1971 there were about 3,700 million people in the world. If the population were 【C1】______ evenly over the earth' s surface there would be about 50 people to the square mile; but there are vast areas of desert and mountain and tropical forest 【C2】______ are uninhabited, 【C3】______ at the other 【C4】______ , in the great cities millions may live within a few square miles.
【C5】______ of the world' s population is concentrated on only a small 【C6】______ of the earth' s land surface, in the rich valleys and 【C7】______ plains, because people up to the present time have 【C8】______ to congregate in place where the climate and soil make it easy to grow food and obtain shelter.
A 【C9】______ world population and the discoveries of science 【C10】______ this pattern of distribution in the future. As men slowly learn to master diseases, control floods, prevent famines, and stop wars, fewer people die every year; and in 【C11】______ the population of the world is steadily 【C12】______ .
When numbers 【C13】______ , the extra mouths must be fed. New lands must be brought 【C14】______ cultivation, or land already 【C15】______ , made to yield larger crops. In some areas the accessible land is largely so intensively cultivated 【C16】______ it will be difficult to make it 【C17】______ more food. in some areas the population is so dense that the land is divided into. units 【C18】______ tiny to allow for much improvement in farming methods. 【C19】______ a large part of this farming population drawn 【C20】______ into industrial occupations, the land might be farmed much more productively by modern methods.
【C1】______
A．scattered
B．restrained
C．separated
D．resembled
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Suppose that a price of $30 per month, there are 30,000 subscribers to cable television in Small Town. If Small Town Cablevision raises its price to $40 per month, the number of subscribers will fall
A．0．66
B．0．75
C．1．0
D．1．4
E．2．0
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faces' in Line 1 of Paragraph 3 ?◑People in the US won't be surprised at any new faces.◑There won' t be any news in the eye of the US people.◑People in the US will become known to one another.◑There won't be a large growth in the US population.
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When farmers raise hogs, there are a number of external costs. In particular, hogs generate methane gas. If the marginal external cost is $100 per hog and the government imposes a tax of $200 per hog,
A．toofewhogswillberaiseD
B．thepricewillbelessthanthemarginalsocialcost．
C．thepricewillbelessthanthemarginalsocialbenefit．
D．thepricewillbelessthanthemarginalcosttohogfarmers．
