题目内容
（请给出正确答案）
Why there are fewer plants, trees and flowers in Holland now？
A．Because there has been a lot of pollution there.
B．Because there was a shortage of water.
C．Because many plants, trees and flowers have been destroyed.
D．Because Holland does not need so many plants, trees and flowers.
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更多“Why there are fewer plants, tr…”相关的问题
A.less
B.fewer
C.few
D.little
A. it's full
B. Good question
C. I bet that was fun
D. Good idea
E. I used to
F. fewer cars
G. Look
H. Hey
A: Why is there never a bus when you want one？
B: (56) . There aren't enough buses on this route.
A: Sometimes I feel like writing a letter to the paper.
B: (57) . You should say that we need more subway lines, too.
A. Yeah. There should be more public transportation in general.
B: And (58) ! There's too much traffic.
A: (59) , is that our bus coming？
B: Yes, it is. But look, (60)
A: Oh, no! Let's go and get a cup of coffee. We can talk about this letter I'm going to write.
These are periods of light sleep during which the eyeballs move rapidly .back and forth under the closed lids and the brain becomes highly activated, which happens three or four times every night of normal sleep.
It is a very interesting question why some people remember dreams regularly while others remember hardly any at all under normal conditions. In considering this, it is important to bear in mind that the dream tends to be an elusive phenomenon for all of us. We normally never recall a dream unless we awaken directly from it, and even then it has a tendency to fade quickly into oblivion.
Given this general elusiveness of dreams, the basic factor that seems to determine whether a person remembers them or not is the same as that which determines all other memory, namely degree of interest. Dream researchers have made a broad classification of people into "recallers"—those who re member at least one dream a month—and "non-recallers", who remember fewer than this. Tests have shown that cool analytical people with a very rational approach to their feelings tend to recall fewer dreams than those whose attitude to life is open and flexible. It is not surprising to discover that in Western society, women normally recall more dreams than men, since women are traditionally allowed an instinctive, feeling approach to life.
In modern urban-industrial culture, feeling and dreams tend to be treated as frivolities (无聊事) which must be firmly subordinated to the realities of life. We pay lip-service to the inner life of imagination as it expresses itself in the arts, but in practice relegate (置于次要地位) music, poetry, drama and painting to the level of spare-time activities, valued mainly for the extent to which they refresh us for a return to work.
Many people are unaware that they dream because ______.
A．their dreams fade very quickly
B．they do not recall their dreams
C．they sleep too heavily
D．they wake up frequently
Women's education may be unusual territory for economists, but enhancing women's contribution to development is actually as much an economic as a social issue. And economics, with its emphasis on incentives (激励), provides guideposts that point to an explanation for why so many girls are deprived of an education.
Parents in low-income countries fail to invest in their daughters because they do not expect them to make an economic contribution to the family: girls grow up only to marry into somebody else's family and bear children. Girls are thus seen as less valuable than boys and art kept at home to do housework while their brothers are sent to school the prophecy (预言)becomes self-fulfilling, trapping women in a vicious circle (恶性循环) of neglect.
An educated mother, on the other hand, has greater earning abilities outside the home and faces an entirely different set of choices. She is likely to have fewer but healthier children and can insist on the development of all her children, ensuring that her daughters are given a fair chance. The education of her daughters then makes it much more likely that the next generation of girls, as well as of boys, will be educated and healthy. The vicious circle is thus transformed into a virtuous circle.
Few will dispute that educating women has great social benefits. But it has enormous economic advantages as well. Most obviously, there is the direct effect of education on the wages of female workers. Wages rise by 10 to 20 per cent for each additional year of schooling. Such big returns are impressive by the standard of other available investments, but they are just the beginning. Educating women also has a significant impact on health practices, including family planning.
The author argues that educating girls in developing countries is ______.
A．troublesome
B．labor-saving
C．rewarding
D．expensive
Samuel Preston, a sociologist at the University of Pennsylvania, studied how the American family is changing. He reported that by the time the average American couple reaches about 40 years of age, their parents are usually still alive. The statistics show the change in lifestyles and responsibilities of aging (老龄化) Americans. The average middle-aged couple can look forward to caring for elderly parents sometime after their own children have grown up. Moreover, because people today live longer after an illness than people did years ago, family members must provide long-term care. These facts also mean that after caregivers provide for their elderly parents, who will eventually die, they will be old and may require care too. When they do, their spouses (配偶) will probably take care of them because they have had fewer children than their parents did.
Because Americans are living longer than ever, more social workers have begun to study ways of caregiving to improve the care of the elderly. They have found that all caregivers share a common characteristic; They believe that they are the best people for the job. The social workers have also discovered three basic reasons why the caregivers take on the responsibility of caring for an elderly, dependent relative. Many caregivers believe they had an obligation (职责) to help their relatives. Some think that helping others makes them feel more useful. Others hope that by helping someone now, they will deserve care when they become old and dependent.
Samuel Preston's study shows that______.
A．lifestyles and responsibilities of the elderly are not changing
B．most American couples over 40 have no living parents
C．middle-aged Americans have to take care of their children and parents at the same time
D．elderly people may need care for a long time because they live longer after an illness
Radiocarbon Dating
Nowadays scientists can answer many questions about the past through a technique called radiocarbon(放射性碳), or carbon-14, dating. One key to understanding how and why something happened is to discover when it happened.
Radiocarbon dating was developed in the late 1940s by physicist Willard F. Libby at the University of Chicago. An atom of ordinary carbon, called carbon-12, has six protons(质子) and six neutrons(中子) in its nucleus. Carbon-14, or C-14, is a radioactive, unstable form. of carbon that has two extra neutrons(原子核). It returns to a more stable form. of carbon through a process called decay(衰减). This process involves the loss of the extra neutrons and energy from the nucleus.
In Libby's radiocarbon dating technique, the weak radioactive emissions(放射) from this decay process are counted by instruments such as a radiation detector and counter. The decay rate is used to determine the proportion of C-14 atoms in the sample being dated.
Carbon-14 is produced in the Earth's atmosphere when nitrogen(氮)-14, or N-14, interacts with cosmic rays(宇宙射线). Scientists believe since the Earth was formed, the amount of nitrogen in the atmosphere has remained constant. Consequently, C-14 formation is thought to occur at a constant rate. Now ratio of C-14 to other carbon atoms in the atmosphere is known. Most scientists agree that this ratio is useful for dating items back to at least 50,000 years.
All life on Earth is made of organic molecules(分子) that contain carbon atoms coming from the atmosphere. So all living things have about the same ratio of C-14 atoms to other carbon atoms in their tissues(组织). Once an organism(有机体) dies it stops taking in carbon in any form, and the C-14 already present begins to decay. Over time the amount of C-14 in the material decreases, and the ratio of C-14 to other carbon atoms goes down. In terms of radiocarbon dating, the fewer C-14 atoms in a sample, the older that sample is.
Nowadays many scientists depend on radiocarbon for dating age-old objects.
A．Right
B．Wrong
C．Not mentioned
I was younger,” says Lindson-Hawley, who studies tobacco and health at theUniversity of Oxford.
[51] By studying about 700 adult smokers, she found out that mom quitthe right way — by stopping abruptly and completely.
In her Study, participants were randomly (随机地) assigned to two groups. Onehad to quit abruptly on a given day, going from about a pack a day to zero. The other cut down gradually overthe course of two weeks. [52]People in both groups used nicotine (尼古丁) patches before they quit, inaddition to a second form. of nicotinereplacement like gum or spray. They also hadtalk therapy with a nurse before and after quit day.
Sixmonths out, more people who had quit abruptly had stuck with it — more thanone-fifth of them, compared to about one-seventh in the other group.Although these numbers appear low, it’s a very, very low quit rate if people trywithout support.
And thequit rates were particularly convincing given that before the study started, mostof the people had said they’drather cut down gradually before quitting.[54] “If you’re training for a marathon, youwouldn’t expectto turn up and just be able to run it. And I think people see that for smokingas well. They think, ‘Well, ifI gradually reduce, it’s almost practice,’” says Lindson-Hawley.But that wasn’t the case. [55] Instead of giving people practice,the gradual reduction likely gave them cravings(瘾) and withdrawal before they evenreached the quit day, which could be why fewer people in that group actuallymade it to that point.[53]“Regardlessof your stated preference, if you’re ready to quit, quittingabruptly is more effective,” says Dr.Gabriela Ferreira. “When youcan quote a specific number like a fifth of the patients were able to quit,that’s acompelling number, and I think that translates to the patient. It gives themthe encouragement, I think, to really go for it,” Ferreira says.
Peoplerarely manage to quit the first time they try. But at least, she says, they canmaximize the odds of success.
51. What dose Lindson-Hawley sayabout her mother？
A) She quit smoking with herdaughter’s help.
B) She succeeded in quittingsmoking abruptly.
C) She was also a researcher oftobacoo and health.
D) She studied the smokingpatterns of adult smokers.
52. What kind of support didsmokers receive to quit smoking in Lindson-Hawley’s study？
A) They were given physicaltraining.
B) They were looked after byphysicians.
C) They were encouraged bypsychologist.
D) They were offered nicotinereplacement.
53. How does Dr. Gabriela Ferreiraview the result of Lindson-Hawley’s experiment？
A) It is idealized.
B) It is unexpected.
C) It is encouraging.
D) It is misleading.
54. The idea of “a marathon” (Line2, Para 5) illustrates the popular belief that quitting smoking ______.
A) is something few canaccomplish.
B) needs some practice first.
C) requires a lot of patience.
D) is a challenge at thebeginning.
55. What happens when people try toquit smoking gradually？
A) They find it even moredifficult.
B) They are simply unable to makeit.
C) They show fewer withdrawalsymptom.
D) They feel much less pain in theprocess.
A．less, less
B．fewer, fewer
C．less, fewer
D．fewer, less
