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[主观题]

One study found women who work with VDTs in early pregnancy are more likely than others to

have their pregnancy end unexpectedly. (Passage One)

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发布时间：2022-12-03

更多“One study found women who work with VDTs in early pregnancy are more likely than others to”相关的问题

第1题

一项研究发现，那些没有子女的老年人的负储蓄与那些有子女的老年人的负储蓄比率大体相等。这一发现对老年人的

负储蓄没有像生命周期模型所预言的那样多的原因有什么含义？

One study found that the elderly who do not have children dissave at about the same rate as the elderly who do have children. What might this finding imply about the reason the elderly do not dissave as much as the life-cycle model predicts？

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第2题

Can eating a chocolate bar every day really prevent age-related memory loss？ People would

say "No". Can eating chocolate cake for breakfast, lunch and dinner be good for your heart？ Again, they would say "No" , because that would be too good to be true. But new research shows that large amounts of flavanols(黄烷醇), substances found in cocoa(可可), tea and some vegetables, may reverse age-related memory failure. Another study is looking to see if high levels of cocoa flavanols can help prevent heart attacks and strokes. Flavanols found in dark chocolate are known to increase blood flow in the part of the brain that controls memory. They also help prevent heart disease by lowering blood pressure and " bad" cholesterol (腱固醇). A new study published online found that cocoa flavanols reverse minor memory loss in older adults. Dr. Scott Small, a professor at Columbia University, is the lead writer of a research paper describing the effects of cocoa flavanols on brain activity. The study involved 37 volunteers aged between 50 and 69. Researchers gave them a high-level flavanol drink made from cocoa beans or a low-level flavanol drink. For a period of three months, some subjects got 900mg of flavanol a day while the others got 10mg. Brain imaging and memory tests were given to each subject before and after the study. Dr. Small says that the subjects who had the high-level flavanol drink showed much improvement on memory tests. The researchers warn that more work is needed because this study was performed on a small group. Researchers at Womens Hospital in Boston recently announced plans to do just that.

The first paragraph indicates that

A．eating chocolate is good for one"s heart

B．people doubt the good effect of eating chocolate

C．eating chocolate may prevent memory loss

D．people should not eat too much chocolate

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第3题

The timing of flu season is a little hard to predict. Part of what makes it unpredictable

is that scientists still don t understand exactly why we have one at all. There have been lots of theories: One theory is that people spend more time indoors, with the windows closed, breathing each other s air. Other scientists have argued that cold of winter weakens our immune systems. A third theory is that the flu virus lives in the cold, dry air, but suffers in the warm, humid air. For a while, scientists had a hard time testing these theories: they needed to run experiments, but researchers aren t allowed to infect humans with illnesses, and most lab animals arent affected by the flu the same way people are. In 2007, a medical researcher named Peter Palese found an 80-year-old journal article that reported that guinea pigs (豚鼠)get infected and pass on the flu just like humans. Palese decided to test Theory 3. The research team led by Palese ran several experiments and in each experiment, they injected half the guinea pigs with influenza A (the common flu), and put them in a box next to a box of uninfected animals. At a temperature of 41 degrees, all four of the exposed guinea pigs caught the flu, but when Palese repeated the experiment at 68 degrees, only one of the animals was infected. And when he ran the test at 86 degrees, none of the exposed animals got sick. The researchers also ran experiments where they varied the humidity in the room but kept the temperature constant: the drier the air, they found, the more animals got sick. Palese s study showed that the influenza virus does spread more effectively in cold, dry air.

What does Paragraph 3 mainly discuss？

A．The direction for future research.

B．The necessity of running more tests.

C．The difficulty of testing the theories.

D．The cost of animal experiments.

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第4题

A daily dose of laugher may be good for the heart because it makes blood vessels work more

efficiently. Depression,【C1】______the other hand,can raise the risk of dying from heart failure,a separate study found. The two studies,【C2】______at a meeting of the American College of Cardiology in Florida, show how psychological factors can【C3】______a persons health. " We dont recommend that you laugh and not exercise,【C4】______we do recommend that you try to laugh on regular basis. Thirty minutes of exercise three times a week and fifteen minutes of laugher on a daily【C5】______is probably good for the vascular(脉管)system,"said Doctor Michael Miller. Miller and his colleagues at the school【C6】______ two movies, one humorous,【C7】______stressful, to twenty healthy volunteers and tested the function of their blood vessels. The researchers specifically looked at the lining of the vessels and found that blood【C8】______ was reduced in fourteen of the twenty volunteers after stressful movie cuttings. But blood flowed more freely in nineteen of the twenty volunteers【C9】______ they laugh at fun movie segments. Average blood flow increased 22% during laughter,and【C10】______ 35% during mental stress,the researchers told the meeting.

【C1】

A．at

B．on

C．in

D．by

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第5题

［A］ For example, the Moche lords of Sipán in coastal Peru were buried in about AD

400 in fine cotton dress and with exquisite ornaments of bead, gold, and silver. Few burials rival their lavish sepulchres. Being able to trace the development of such rituals over thousands of years has added to our understanding of the development of human intellect and spirit.

［B］ By 40,000 years ago people could be found hunting and gathering food across most of the regions of Africa. Populations in different regions employed various technological developments in adapting to their different environments and climates.

［C］ Archaeological studies have also provided much information about the people who first arrived in the Americas over 12,000 years ago.

［D］ The first fossil records of vascular plants—that is, land plants with tissue that carries food—appeared in the Silurian period. They were simple plants that had not developed separate stems and leaves.

［E］ Laetoli even reveals footprints of humans from 3.6 million years ago. Some sites also contain evidence of the earliest use of simple tools. Archaeologists have also recorded how primitive forms of humans spread out of Africa into Asia about 1.8 million years ago, then into Europe about 900,000 years ago.

［F］ One research project involves the study of garbage in present-day cities across the United States. This garbage is the modern equivalent of the remains found in the archaeological record. In the future, archaeologists will continue to move into new realms of study.

［G］ Other sites that represent great human achievement are as varied as the cliff dwellings of the ancient Anasazi (a group of early Native Americans of North America) at Mesa Verde, Colorado; the Inca city of Machu Picchu high in the Andes Mountains of Peru; and the mysterious, massive stone portrait heads of remote Easter Island in the Pacific.

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第6题

The study also found that 22 percent of all schools did not require students to take any P

. E. (体育课).

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第7题

Signs barring cell-phone use are a familiar sight to anyone who has ever sat in a hospital

waiting room. But the_____(1)popularity of electronic medical records has forced hospital-based doctors to become_____(2)on computers throughout the day, and desktops-which keep doctors from besides-are_____(3)giving way to wireless devices.

As clerical loads increased, "something had to_____(4), and that was always face time with patients," says Dr.Bhakti Patel, a former chief resident in the University of Chicago&39;s internal-medicine program. In fall 2010, she helped_____(5)a pilot project in Chicago to see if the iPad could improve working conditions and patient care. The experiment was so_____(6)that all internal-medicine program adopted the same_____(7)in 2011. Medical schools at Yale and Stanford now have paperless, iPad-based curriculums. "You&39;ll want an iPad just so you can wear this" is the slogan for one of the new lab coats_____(8)with large pockets to accommodate tablet computers.

A study of the University of Chicago iPad project found that patients got tests and_____(9) faster if they were cared for by iPad-equipped residents.Many patients also_____(10) a better understanding of the illnesses that landed them in the hospital in the first place.

A.dependent

B.designed

C.fast

D.flying

E.gained

F.give

G.growing

H.launch

I.policy

J.prospect

K.rather

L.reliable

M.signal

N.successful

O.treatments

第1题答案是：

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第8题

The Death of a Spouse For much of the world, the death of Richard Nixon was the end of a complex p

The Death of a Spouse

For much of the world, the death of Richard Nixon was the end of a complex public life. But researchers who study bereavement (丧失亲人) wondered if it didn't also signify the end of a private grief. Had the former president merely run his allotted fourscore and one, or had he fallen victim to a pattern that seems to afflict (折磨) longtime married couples: one spouse quickly following the other to the grave？

Pat, Nixon's wife of 53 years, died last June after a long illness. No one knows for sure whether her death contributed to his. After all, he was elderly and had a history of serious heart disease. Researchers have long observed that the death of a spouse particularly a wife is sometimes followed by the untimely death of the grieving survivor. Historian Will Durant died 13 days after his wife and collaborator, Ariel; Buckminster Fuller and his wife died just 36 hours apart. Is this more than coincidence？

"Part of the story, I suspect, is that we men are so used to ladies feeding us and taking care of us," says Knud Helsing, an epidemiologist (流行病学家) at the Johns Hopkins School of Public health, "that when we lose a wife we go to pieces. We don't know how to take care of ourselves." In one of several studies Helsing has conducted on bereavement, he found that widowed men had higher mortality rates than married men in every age group. But, he found that widowers who remarried enjoyed the same lower mortality rate as men who'd never been widowed.

Women's health and resilience (愉悦) may also suffer after the loss of a spouse. In a 1987 study of widows, researchers from the University of California, Los Angeles, and UC, San Diego, found that they had a dramatic decline in levels of important immune-system cells that fight off disease. Earlier studies showed reduced immunity in widowers.

For both men and women, the stress of losing a spouse can have a profound effect. "All sorts of potentially harmful medical problems can be worsened," says Gerald Davison, professor of psychology at the University of Southern California. People with high blood pressure, for example, may see it rise. In Nixon's case, Davison speculates, "the stroke (中风), although not caused directly by the stress, was probably hastened by it." Depression can affect the surviving spouse's will to live; suicide are elevated in the bereaved, along with accidents not involving cars.

Involvement in life helps prolong it. Mortality, says Duke University psychiatrist Daniel Blazer, is higher in older people without a good social-support-system who don't feel they're part of a group or a family, that they "fit in" somewhere. And that's a more common problem for men, who tend not to have as many close friendships as women. The sudden absence of routines can also be a health hazard, says Blazer. "A person who loses a spouse shows deterioration in normal habits like sleeping and eating." he says. "They don't have that other person to orient them, like when do you go to bed, when do you wake up, when do you eat, when do you take your medication, when do you go out to take a walk？ Your pattern is no longer locked into someone else's pattern, so it deteriorates."

While earlier studies suggested that the first six months to a year - or even the first week - were times of higher mortality for the bereaved, some newer studies find no special vulnerability (弱点) in this initial period. Most men and women, of course do nor die as a result of the loss of a spouse. And there are ways to improve the odds. A strong sense of separate identity and lack of over-dependency during the marriage are helpful. Adult sons and daughters, siblings (兄弟姐妹) and friends need to pay special attention to a newly widowed parent. They can make sure that he or she is socializing, getting proper nutrition and medical care, expressing emotion and, above all, feeling needed and appreciated.

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第9题

The study, published in the current issue of the Journal of Experimental Education, found significan

t increase in ninth-grade math test scores among students who had spent early grades in smaller classes, with the gains even more pronounced among minority students. (前置)

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第10题

The word "mind", when used in the sense of "object to", "dislike", &qu

ot;be annoyed by", is usually found in questions and negative sentences and can be followed by an /f-clause or an-ing structure. Study the model and rewrite each of the following sentences with "mind".

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