题目内容
（请给出正确答案）
A) caters
B) adheres
C) ascribes
D) subscribes
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更多“More than 85 percent of French…”相关的问题
A．21 to 34 percent
B．30 to 60 percent
C．21 to 30 percent
D．34 to 60 percent
A、South Island
B、North Island
C、Stwart Island
D、the Chatham Islands
听力原文： Ask any kid about homework, and you'll get the same response: There is too much of it, and too much of it is worthless.
Ah, kids. What do they know？
Maybe more than you think.
The push 'for high standards in American education has driven schools to pile on the homework. Twenty years ago elementary school children averaged 85 minutes of homework a night, according to a University of Michigan study. Today that's grown to more than two hours a night, a 50 percent increase.
That's not the only thing that's grown. So have the number of children who report having back, shoulder and neck pain as a result of hauling back packs heavy with homework, according to the American Academy of Orthopedic Surgeon.
Results are mixed. The U.S. Department of Education tests progress in math, reading and science under a program called the National Assessment of Educational Progress. And in the twenty years, while fourth-graders have made moderate improvements in math and science, reading scores actually have declined slightly.
Junior and senior high students have made better gains in test scores. But despite that, a vocal anti-homework movement has emerged the last few years that argues that too much homework takes away from important family time and actually creates a counterproductive backlash in some students who simply get tired of the grind. What's more, they argue, few studies have established any concrete benefits to heavy homework loads.
(33)
A．It has doubled.
B．It has increased by half.
C．It has an 85% growth.
D．It has grown out of proportion.
A．Because she has more voluntary muscles than an average man.
B．Because 30 to 40 percent less muscle for her body mass than a man.
C．Because 60 to 70 percent less muscle for her body mass.
D．Because less muscle fiber for her body weight.
At the age of 3, the children who attended the educational day-care center had significantly higher IQs than did the home-reared children. This difference was likely due to the decline in the IQs of the home-reared children during the period from 12 to 18 months of age. By the time the children were 5 years old, 39 percent of the home-reared children had IQs below 85 but only 11 percent of the educational day-care children had IQs this low. In the most recent evaluation of this project, positive effects of educational day-care on the intellectual development and academic achievement of the children were evident at age 12.
Some parents, such as those in Ramey's study, have difficulty providing an adequate environment for the intellectual needs of their infants. Once these difficulties are a recurring part of the family system, changing efforts probably will be more difficult and costly. Early intervention in the family system is directed at changing parental adaptive and responsive functioning so that permanent negative effects are minimized.
In another investigation, the Infant Health and Development Program, early intervention with low birth weight children revealed that both home visitation(探望)and an educational child curriculum improved the children's IQs, decreased behavior. problems, and improved the home environment. The intervention was more effective with mothers with low educational attainment than those with high educational attainment, 'more effective for African-American than White children, and effective for most at- risk children.
Intervention programs have the most positive effects on children's well-being when they (a) begin as early as possible, (b) provide services to parents as well as to the children, (c) have a low child-teacher ratio, (d) have high parental involvement, and (e) have frequent contacts. In one review of family intervention studies, intervention was more effective when there were eleven or more contacts between the intervener and the family. While eleven sessions is a some- what arbitrary number, it does indicate that a certain duration of contact is necessary for intervention success.
From the first sentence we learn that researchers ______.
A．have increased the risks to child growth by manipulating the natural environment
B．are increasingly aware of the effects of environmental factors on intelligence development
C．are increasingly interested in figuring out how intelligence is developed in early child- hood
D．are increasingly interested in manipulating the environment without being aware of the risks involved to children
Youth of Today
-- No savings, no pension, huge debts--
Leaving school or university means financial independence -- but does it also mean debt？ Some experts say the young should take some care.
It is life, but not as we know it. As this year's school leavers and graduates in Britain move on to further education or work, tasting financial independence for the first time, they show signs of being entirely different to previous generations in their attitudes to money, according to information collected by Cash. Used to debt but more affluent than previous generations, the current crop of 16 to 24-year-olds is a complex sector of society. But if they can handle their debts, these 7.5 million young adults have the potential to become quite sophisticated on money matters.
Cash looked for the financial hallmarks of this group.
They are going to be big spenders -- and will be targeted heavily by retailers. "The market for products and services aimed at this group has continued to thrive" , concludes research organization Mintel in its recent report for retailers "Selling to and Profiting from the Under 25s". This is "partly because the period during which people are young, free and single, unencumbered (不受妨碍的) by parents and/or children has expanded to the late twenties and early thirties," it says.
While 13 percent of the population regularly pays their utility (公共设施), credit card and other bills late, this proportion rises to a remarkable 64 percent for 18- to 24-year-olds, according to research conducted among 1000 adults by uSwitch.com. In theory, this suggests that more than 4 million of them are heading for such poor credit ratings that they will find it difficult to borrow in the future. But lenders may become more flexible in their lending terms rather than lose out on this huge sector of the consumer market.
Near one in three (28 percent) of people under 35 "do not consider their future financial position", according to research from Accenture HR Services.
Although half of 18- to 25-year-olds want to own their home some day, they seem almost insurmountable hurdles, according to Mintel. "For those who had not yet bought their own property, the prospect of trying to do so seemed daunting -- if not impossible -- financially." Or could it be that their future prosperity will depend on whether they inherit properly from their parents？
They regard as necessities many items which were seen as luxuries by their parents at the same age. More than nine out of ten have their own mobile phones. "Some looked on their phone as a kind of security blanket, feeling lost without it," says Mintel. A car is seen as "vital" by 64 percent of 18- to 25- year-olds, and designer clothes are worn by 44 percent of men and 35 percent of women in this age group, adds Mintel. Computer equipment is a high priority for many twenty-year-old people. Audio- visual equipment is particularly valued by young men.
Credit card ownership is increasing. Nearly two-thirds of young adults have a card. More than half (58 percent) of the under-25s do not pay off their credit card bill in full each month, according to Mintel -- including 16 percent who owe more than ￡500. With credit card ownership predicted to increase nearly 20 percent by 2009, the younger age group could be increasingly targeted, as they are more accustomed to borrowing than older groups.
Debt is commonplace in this age group. Barclays predicts that graduate debt will average ￡17,500 in 2006, rising to nearly ￡34 000 by 2010.
A third of this group believe they are "too young" to start thinking about a pension, according to Accenture. "There is a sea change in behavior. going on here," says Mervyn Kohler of Help the Aged. "For recent graduates who are saddled with debt and struggling to buy a home, the last thing they would
A．Y
B．N
C．NG
听力原文： The death rate from influenza rose markedly in the 1990's, federal scientists reported. The explanation, they said, is that a greater proportion of the population is elderly and thus particularly susceptible to flu. There was an average of 36,000 flu deaths a year in the 1990's as compared to 20,000 a year in previous decades, the investigators, from the Centers for Disease Control and Prevention, reported in the Journal of the American Medical Association. Ninety percent of influenza deaths were in people 65 and older, said Dr. Keiji Fukuda, the principal researcher for the study. But Dr. Fukuda and his colleagues reported that the virus was especially deadly in people over 85, who might be up to 32 times more likely than those 65 to 69 to die from a flu infection.
The researchers also concluded that there were large numbers of deaths among the elderly from another virus, respiratory syncytial virus, known as R. S. V. As many as 78 percent of the 11,000 people who died from R. S. V. each year were 65 and older, the researchers concluded.
In an editorial accompanying the paper, Dr. David M. Morens of the National Institute of Allergy and Infectious Diseases, said that many people who were particularly vulnerable to influenza did not get flu vaccines, the only method of preventing the disease. Many mistakenly believe that the vaccine, which is made from a killed virus, can give them the flu. Over the last few years, Dr. Fukuda said, just 65 percent to 67 percent of people 65 and older were immunized. Even when they do get the vaccine, he added, it is less effective in the elderly than it is in younger people. And there is no vaccine to protect against R. S. V. Dr. Morens was not optimistic about the immediate future. The best hope, he said, is for improved flu vaccines and a vaccine for R. S.V. But for now, he said, doctors must do a better job of persuading older people to be vaccinated.
(30)
A．20,000
B．26,000
C．30,000
D．36,000
Have you ever wondered how a nuclear power plant works or how safe nuclear power is？ In this article, we will examine how a nuclear reactor and a power plant work.
Uranium
Uranium is a fairly common element on Earth, which was taken into the planet during the planet's formation. Uranium is originally formed in stars. Old stars exploded, and the dust from these shattered stars aggregated together to form. our planet. Uranium-238 (U-238) has an extremely long life (4.5 billion years), and therefore is still present in fairly large quantities. U-238 makes up 99 percent of the uranium on the planet. U-235 makes up about 0.7 percent of the remaining uranium found naturally, while U-234 is even rarer and is formed by the decay of U-238.
Nuclear Fission (裂变)
A nuclear fission happens when a uranium-235 nucleus with a neutron captures another neutron. The nucleus then splits into two lighter atoms and throws off two or three new neutrons (the number of ejected neutrons depends on how the U-235 atom happens to split). The two new atoms then produce gamma radiation as they settle into their new states. There are three things about this induced fission process that make it especially interesting:
The probability of a U-235 atom capturing a neutron as it passes by is fairly high. In a reactor working properly (known as the critical state) , one neutron ejected from each fission causes another fission to occur.
The process of capturing the neutron and splitting happens very quickly, on the order of picoseconds (1×1012seconds).
An incredible amount of energy is released, in the form. of heat and gamma radiation, when a single atom splits. The two atoms that result from the fission later release beta radiation and gamma radiation of their own as well. The energy released by a single fission comes from the fact that the fission products and the neutrons, together, weigh less than the original U-235 atom. The difference in weight is converted directly to energy at a rate governed by the equation E = mc2.
In order for these properties of U-235 to work, a sample of uranium must be enriched so that it contains 2 percent to 3 percent or more of uranium-235. Three-percent enrichment is sufficient for use in a civilian nuclear reactor used for power generation. Weapons-grade uranium is composed of 90-percent or more U-235.
Inside a Nuclear Power Plant
To build a nuclear reactor, what you need is some mildly enriched uranium. Typically, the uranium is formed into pellets (芯块) with approximately the same diameter as a coin and a length of an inch or so. The pellets are arranged into long rods, and the rods are collected together into bundles. The bundles are then typically submerged in water inside a pressure vessel. The water is used to lower the heat. In order for the reactor to work, the bundle, submerged in water, must be slightly supercritical. That means that, left to its own devices, the uranium would eventually overheat and melt.
To prevent thi
A．Y
B．N
C．NG
A．It had the most foreign students.
B．Its students outnumbered those in other states.
C．Most of its foreign students were the Japanese.
D．It offered more financial aids.
