-
Why is it desirable to operate paralleled AC generators at the same power factor?（）
A . Circulating currents are kept to a minimum
B . Field excitation losses are kept to a minimum
C . Generator rotors will have a lesser tendency to hunt
D . Because a power factor increase will decrease kilowatt output
-
Why are you so late?（）
A . It‘s a shame.
B . I came across an old friend.
C . Never mind.
D . That‘s all right.
-
Mariners proceeding across the main routes are（）to do so at as wide an angle as practicable.
A . recommended
B . reported
C . applied
D . complied
-
You are connected using SQL* Plus to a multitenant container database (CDB) with SYSDBA privilegesand execute the following sequence statements:What is the result of the last SET CONTAINER statement and why is it so?（）
A . It succeeds because the PDB_ADMIN user has the required privileges.
B . It fails because common users are unable to use the SET CONTAINER statement.
C . It fails because local users are unable to use the SET CONTAINER statement.
D . If fails because the SET CONTAINER statement cannot be used with PDB$SEED as the target pluggable database (PDB).
-
（）, so they are widely used on board ship nowadays.
A . Diesel engines have more advantages in comparison with gasoline engines
B . Diesel engines have more advantages in comparison to gasoline engines
C . Gasoline engines have more advantages in comparison with diesel engines
D . Gasoline engines have more advantages in comparison to diesel engine
-
The ________ theory is the most widely accepted theory of the term structure of interest rates because it explains the major empirical facts about the term structure so well.
-
The reason why so many Australians don’t speak other languages is that they are so proud of their own language._______________
-
Why is manufacturing in China so popular?
A、It is a dream
B、It is a carmaker’s dream.
C、It is so fast.
D、The market is growing so fast.
-
The outside lies the wide and brittle world of _____________________,so it is increasingly unnecessary for people to leave the house these days?
-
Why is Bookstore's customer service so successful?
-
Why is Barbie no longer so popular？
A．Because she never change her features.
B．Because the maker doesn't like to invest more on her.
C．Because she has met a strong competitor.
D．Because customers are fed up with her.
-
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
-
听力原文：F: What I can't make out you is why you are so keen on the Layer-de-la-Haye house. Why on earth should we choose, actually choose, to live out in a village, even if it is a popular village. You know that I would love to live in town and...
M: ...and be boxed in by a thousand other houses I suppose~ Surrounded by a thousand faceless neighbors. No, let' s go for the village. After all I'm the one who has to do all the traveling. Back and forth to London every day. And I would rather add a 15 minutes bus ride to the train ride than be--How does it go？--cabin' d, cribb' d confi' d.
F: That' s all very well...all very well to take that romantic attitude. You know... you think you can get out of everything...wriggle out of any argument...by quoting Shakespeare. What about my preferences？ You are being selfish you know.
M: Selfish？ Me？
F: Yes. Think of the children. Its seems to me that you are so carried away with the idea that your personal likes and dislikes are making you anything but practical.
What's the relations between the speakers？
A．Friends.
B．Colleagues.
C．Husband and wife.
D．Landlord and tenant.
-
听力原文：W: What's the reason for the warning on every pack of cigarettes？ I mean the note that says smoking is dangerous to health. Why does the manufacturer say so？
M: It's the law here. They have to print it.
Q: What are they talking about？
(14)
A．People must give up cigarettes.
B．A health warning on cigarette packs.
C．The law doesn't allow people to smoke.
D．Smoking can cause lung cancer.
-
"Why is the university doing so much building？""The number of students______that there aren't enough classrooms."
A．have increased so rapidly
B．has increased so rapid
C．have increased so rapid
D．has increased so rapidly
-
The reason why so many people sit before the television tonight is that there will be a______game of World Cup.
A．living
B．live
C．lively
D．lived
-
Why do people think that Venice is so great？
A. Because it is a famous tourist attraction.
B. Because you can reach anywhere by boat.
C. Because all the mistakes have been removed.
D. Because it is well-known for its merchants.
-
Mark Twain once observed that giving up smoking is easy. He knew, because he'd done it hundreds of times himself. Giving up for ever is a trifle more difficult, apparently, and it is well known that it is much more difficult for some people than for others. Why is this so？
Few doctors believe any longer that it is simply a question of will power. And for those people that continue to view addicts as merely "weak", recent genetic research may force a rethink. A study conducted by Jacqueline Vink, of the Free University of Amsterdam, used a database called the Netherlands Twin Register to analyze the smoking habits of twins. Her results, published in the Pharmacogenomics Journal, suggest that an individual's degree of nicotine dependence, and even the number of cigarettes he smokes per day, are strongly genetically influenced.
The Netherlands Twin Register is a voluntary database that contains details of some 7,000 pairs of adult twins (aged between 15 and 70) and 28,000 pairs of childhood twins. Such databases are prized by geneticists because they allow the comparison of identical twins (who share all their genes) with fraternal twins (who share half). In this case, however, Dr. Vink did not make use of that fact. For her, the database was merely a convenient repository of information. Instead of comparing identical and fraternal twins, she concentrated on the adult fraternal twins, most of whom had completed questionnaires about their habits, including smoking, and 536 of whom had given DNA samples to the register.
The human genome is huge. It consists of billions of DNA "letters", some of which can be strung together to make sense (the genes) but many of which have either no function, or an unknown function, To follow what is going on, geneticists rely on markers they have identified within the genome. These are places where the genetic letters may vary between individuals. If a particular variant is routinely associated with a particular physical feature or a behavior. pattern, it suggests that a particular version of a nearby gene is influencing that feature or behavior.
Dr. Vink found four markers which seemed to be associated with smoking. They were on chromosomes 3, 6, 10 and 14, suggesting that at least four genes are involved. Dr. Vink hopes that finding genes responsible for nicotine dependence will make it possible to identify the causes of such dependence. That will help to classify smokers better (some are social smokers while others are physically addicted) and thus enable "quitting" programs to be customized.
Results such as Dr. Vink's must be interpreted with care. Association studies, as such projects are known, have a disturbing habit of disappearing, as it were, in a puff of smoke when someone tries to replicate them. But if Dr. Vink really has exposed a genetic link with addiction, then Mark Twain's problem may eventually become a thing of the past.
Mark Twain is mentioned in the passage in order to show that
A．he is a man with very Strong will power.
B．it is easy to give up smoking temporarily.
C．famous writers are often heavy smokers.
D．only few people have his determination.
-
Why do people think that Venice is so great？.
A．Because it is a famous tourist attraction.
B．Because you can reach anywhere by boat.
C．Because it is well-known for its merchants.
D．Because all the mistakes have been removed.
-
Why does the author mention "there is wide-spread uneasiness and confusion"（Para. 1)？_____
Why does the author mention "there is wide-spread uneasiness and confusion"(Para. 1)？______
A．The abundant food supply is not expected to last
B．Britain is importing less food
C．Despite the abundance, food prices keep rising
D．Britain will cut back on its production of food
-
Why is it considered strange that there are so many shy people？
A．Because it is considered by psychologists to be an undesirable trait.
B．Because it is not a trait associated with social animals.
C．Because our ancestors were not shy, so we should be like them.
D．Because shy people could not have survived in early human society.
-
—Customer：We have ordered for almost one hour. Why is it so hard to get our dishes ready in your restaurant？
—Waiter:I’m really sorry about that.()
对
错
-
This is perhps one of _____ importnt resons why so mny people write ____ poetry. ; theB．the ;This is perhps one of _____ importnt resons why so mny people write ____ poetry. ; the B．the ; the C．the; 不填 D．; 不填
A．a ; the
B．the ; the
C．the; 不填
D．a; 不填
-
English is widely used. It __1__ by people in England, Australia and the United States. In Sweden, France and many other countries, a lot of people understand English, too. It is one of the __2__ languages at international meetings. Most international business letters are __3__ in English. Many books and magazines are printed in English, too .English __4__ be difficult, but it is very useful. It is a bridge to so much knowledge. If you know English, you'll find you can __5__ the world better, so we should study it hard.
1)、
A.written
B.may
C.is spoken
D.learn
E.working
2)、A.written
B.may
C.is spoken
D.learn
E.working
3)、A.written
B.may
C.is spoken
D.learn
E.working
4)、A.written
B.may
C.is spoken
D.learn
E.working
5)、A.written
B.may
C.is spoken
D.learn
E.working
