阅读理解。 There is a lot of misunderstandin

题型:阅读理解

问题:

阅读理解。

     There is a lot of misunderstanding about studying. Most students have not been taught the principles

behind really effective working. Imagine a graph showing the amount a person learns against the number

of hours he works in a day. If he doesn't do any work, he learns nothing (point 0). If he does an hour's

work he learns a certain amount (point 1). If he does two hours' work he learns about twice as much

(point 2). If he does more work he'll learn still more (point 3). However, if he tries to do twenty-three

and a half hours' work in a day, he will be so tired that he'll hardly remember anything: what he learns

will be very little (point 4). If he did less work he'd learn more (point 5).

     Now whatever the exact shape of the graph's curve(曲线), made by joining these points, it must

have a high point. Point "X" is the very maximum anyone can learn in the day. And this represents the

optimum, the best, amount of work to do. It is the best possible compromise between adequate time

at the books and fatigue(劳累). Fatigue is an absolutely real thing; one can't escape it or ignore it. If

you try to ignore it and press yourself to work past the optimum(最适度), you will only get on this

downward slope and achieve less than the best - and then become very tired and lose your power of

concentration.

      The skill in being a student consists of getting one's daily study as near the optimum point as

possible. I cannot tell you what the optimum is. It differs with the type of work, it differs from person

to person, and even in the same person it varies from week to week. You must try to find your own.

Every day you study, bear this principle of the optimum in mind. When you feel yourself getting fatigued,

if you find yourself reading the same paragraph over and over again and not taking it in, that's a pretty

good sign you've reached your highest point for the day and should stop. Most ordinary students find

their optimum at five hours a day. Yours may be a little more or a little less - but if you get in five hours'

good work a day, you will be doing well.

     Now, what are you doing with yourself when you aren't working? Before examinations some students

do nothing at all except sit in a chair and worry. Here is another misunderstanding. People often think that

the mind works like the body; it does not. If one wanted to save one's physical energy in order to cut the

maximum amount of firewood, one would lie flat on a bed and rest when one wasn't chopping. But the

mind cannot rest. Even in sleep you dream, even if you forget your dreams. The mind is always turning.

It gets its relaxation only by variety. That is what makes the mind rest.

     When you've finished your optimum number of hours you must stop. You must not then sit around in

the chair thinking about the work - that only tires without any learning. You must get out and do something. It doesn't matter what - anything so long as you are actively doing something else but work.

1. According to the passage, _______.

A. the longer you study every day, the more you will learn

B. you'll achieve better learning results if you work three hours every day

C. the less work you do, the better you will learn

D. your work efficiency will decrease once you exceed a certain point of work

2. Fatigue can result in ________.

A. loss of memory

B. a need for relaxation

C. a lot of anxiety

D. loss of concentration

3. The passage tells us that a person's optimum number of working hours _______.

A. follows a regular pattern with each individual

B. changes regularly from week to week

C. can be partly determined by the sort of work he is doing  

D. should be determined before he gets too tired

4. The only way the mind can relax is by ________.

A. doing a variety of things in turn

B. not thinking about anything

C. turning continuously

D. getting oneself in a state of fatigue

5. After you have reached the optimum point of study in a day, you should ________.

A. lie in bed and rest

B. do something else actively

C. do some physical labor

D. stop thinking about your studies

考点:日常生活类阅读
题型:阅读理解
任务型阅读(共10小题;每小题1分,满分10分)
请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。注意:每个空格只填1个单词。请将答案写在答题卡上相应题号的横线上。
Could your cellphone give you cancer? Whether it could or not, some people are worrying about the possibility that phones, powerlines and wi-fi (路由器) could be responsible for a range of illnesses, from rashes to brain tumours.
For example, Camilla Rees, 48, a former investment banker in the US, moved out of her apartment in San Francisco because of the radiation coming from next door. Rees told the Los Angeles Times that when her neighbors moved in and installed a wi-fi router she lost her ability to think clearly. “I would wake up dizzy in the morning. I’d fall to the floor. I had to leave to escape that nightmare,” she said. Since then, she’s been on a campaign against low-level electromagnetic fields, or EMFs(低频电磁场).
And she’s not alone. Millions of people say they suffer from headaches, depression, nausea and rashes when they’re too close to cellphones or other sources of EMFs.
Although the World Health Organization has officially declared that EMFs seem to pose little threat, governments are still concerned. In fact, last April, the European Parliament called for countries to take steps to reduce exposure to EMFs. The city of San Francisco and the state of Maine are currently considering requiring cancer-warning labels on cellphones.
If these fears are reasonable, then perhaps we should all be worried about the amount of time we spend talking on our phones or plugging into wi-fi hotpots.
Some say there is evidence to support the growing anxieties. David Carpenter, a professor of environmental health sciences at the University at Albany, in New York, thinks there’s a greater than 95% chance that power lines can cause childhood leukemia. Also there’s a greater than 90% chance that cellphones can cause brain tumours.
But others believe these concerns are unreasonable paranoia (猜疑). Dr Martha Linet, the head of radiation epidemiology at the US National Cancer Institute, has looked at the same research as Carpenter but has reached a different conclusion. “I don’t support warning labels for cellphones,” said Linet. “We don't have the evidence that there’s much danger.”
Studies so far suggest a weak connection between EMFs and illness — so weak that it might not exist at all. A multinational investigation of cellphones and brain cancer, in 13 countries outside the US, has been underway for several years. It’s funded in part by the European Union, in part by a cellphone industry group.
According to Robert Park, a professor of physics at the University of Maryland in the US, the magnetic waves aren’t nearly powerful enough to break apart DNA, which is how known threats, such as UV rays and X-rays, cause cancer.
Perhaps it’s just psychological. Some experts find that the electro-sensitivity syndrome seems to be similar to chemical sensitivity syndrome, which is a condition that’s considered to be psychological.
Whether EMFs are harmful or not, a break in the countryside, without the cellphone, would probably be good for all of us.
Title: Could cellphones give you cancer?
Key points
Supporting details
Cellphones are (71)______ to use
● Some people think it (72)______ for cellphones to cause cancer.
● Camilla Rees got ill after his neighbor installed a wi-fi router.
● Millions of people have the (73) _______ problems as Camilla.
● Some evidence supports people’s anxieties.
Cellphones are safe
to use
● Some believe that these concerns are just paranoia.
● So far, studies show that there isn’t much (74)______ between EMFs and illness.
● Robert Park thinks that the magnetic waves aren’t powerful enough to (75)_______ DNA.
● It’s just for psychological (76)_______ that people feel ill when they use cellphones.
Attitudes and (77)______
● Some governments are (78)_______ about the safety of cellphones or EMFs.
● The author thinks that we should(79)_______ the chance of talking on the phone or spend more time in the(80)_____ areas without cellphones.
题型:阅读理解

反映个性差异的特征包括()

A.理想

B.动机

C.气质

D.性格

E.能力

题型:阅读理解

一传送带装置示意图如图,其中传送带经过AB区域时是水平的,经过BC区域时变为圆弧形(圆弧由光滑模板形成,为画出),经过CD区域时是倾斜的,AB和CD都与BC相切。现将大量的质量均为m的小货箱一个一个在A处放到传送带上,放置时初速为零,经传送带运送到D处,D和A的高度差为h。稳定工作时传送带速度不变,CD段上各箱等距排列,相邻两箱的距离为L。每个箱子在A处投放后,在到达B之前已经相对于传送带静止,且以后也不再滑动(忽略经BC段时的微小滑动)。已知在一段相当长的时间T内,共运送小货箱的数目为N。这装置由电动机带动,传送带与轮子间无相对滑动,不计轮轴处的摩擦。求电动机的平均输出功率P。

题型:阅读理解

经济学家认为政府对能源利用方面的管制是多余的,市场完全可以自行调节能源的供需矛盾。如果能源真紧张,那么反映在市场上能源价格自然会上涨,而能源价格的上涨一方面因为使用成本提高而使得人们减少对能源的使用;另一方面因为利润增加使得能源供应商增加供给。
以下哪项为真,能有力地对上述论述提出质疑?( )

A.能源价格上涨后人们会更多地使用节能产品
B.由于难以忍受能源价格的上涨造成的生活成本的增加,人们就会抗议政府在能源管理方面无所作为
C.能源价格降低后会刺激人们使用更多的能源
D.人们对能源的需求缺乏弹性

题型:阅读理解

普通级业务同一专线故障重复发生次数指标要求为()

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