A．Means of e?waste recyclingB．How e?waste comes into beingC．The benefit of e?waste recyclingD．The technologies of e?waste recyclingE．The importance of the electronic waste recycleF．Modern techno 题目和参考答案——青夏教育精英家教网—

题目内容

A．Means of e?waste recycling

B．How e?waste comes into being

C．The benefit of e?waste recycling

D．The technologies of e?waste recycling

E．The importance of the electronic waste recycle

F．Modern technology brings convenience and e?waste

Modern technology does bring us many conveniences（便利），from Wi?Fi（无线网络）enabled cell phones and ever? smaller laptop computers that make entire lives easy to energy? efficient washers that use half the power and time to complete their tasks. However，these new toys and equipment finally become electronic waste （电子垃圾）（e? waste）once they are out of use.

E? waste includes everything from empty printer ink containers to broken refrigerators. As people buy new items to replace aging electronics or make upgrades（升级），more electronic waste comes into being. In some cases，such as 2009's switch from analog（模拟）to digital television broadcasting in the United States，changes in technology are so great that old equipment may not even work at all with new systems.

There are many reasons why it is important to recycle electronic waste. Much of the material used to construct electronics，including metal and plastic parts，can be recycled into new items at a discount of the cost and energy use needed to create things from new raw materials（原材料）. Additionally，many electronics contain poisonous substances （有毒物质）that are harmful to the environment and could be deadly if they go into an area's groundwater. When properly recycled，they can be reused and will not do harm to the environment. Because of these environmental concerns，many areas require by law that electronic waste be properly recycled.

The availability（可用性）of e?waste recycling programs varies from place to place. In some areas，annual collections are held once or twice a year as a means of dealing with e?waste as well as used engine oil or other waste that is harmful to the environment. There are also some good alternatives （替代品） to recycling your e?waste. Any items that are in working condition can be given to friends or donated to charities（慈善机构）like Goodwill or the Salvation Army，who rely heavily on donations （捐赠） . Freecycling ，or passing on your unwanted items to those in need of them，is also a means of finding new homes for used items.

E?waste recycling helps protect the environment by reducing the amount of poisonous materials placed in landfills（垃圾场）and saving recyclable parts to save energy and other resources. Recycling is a way of life. Stick to that choice every single day and recycling will become second nature to us.

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Can eating a chocolate bar every day really prevent age-related memory loss? No. But a new research shows that large amounts of flavones, substances found in cocoa, tea and some kinds of vegetables, may improve age-related memory failure.

Dr. Scott Small is a professor of neurology (神经病学) at Columbia University in new York City. He is the lead writer of a research paper describing the effects of cocoa flavones on brain activity. His study involved 37 volunteers aged between 50 and 69. Researchers gave them a high-level flavones drink made from cocoa beans or a low-level flavones drink. For a period of three months, some subjects got 900 milligrams of flavones a day. The others got 10 milligrams of flavones each day. Brain imaging and memory tests were given to each study subject before and after the study. Dr. Small says that the subjects who had the high-level flavones drink showed much improvement on memory tests.

The researchers warn that more work is needed to be done because this study was performed only on a small group. Dr. Joann Manson is the lead researcher of a four-year study involving 18,000 adults. This study will use flavones capsules(胶囊). The study subjects will be divided into two groups and will take two pills per day. The capsules used will all look the same. But one group's capsules will contain flavones, while the other group will take capsules made of an inactive substance, or placebo

Dr. Manson says it's not necessary for people to start eating more chocolate, because a person would have to eat a huge amount of chocolate to get the same level of flavones given to the rest subjects. He adds many manufacturers have planned to remove the flavones from their chocolate products. Similarly, Dr. Manson says a cocoa-based flavones extract(提取)may be developed in the future But he says that more studies are needed to see how much flavones is good for our health.

1.What was done to the subjects after Dr. Small’s study?

A. They were asked to take a high-level flavones drink.

B. They were given capsules containing flavones.

C. They were given brain imaging and memory tests.

D. They were asked to take two pills of flavones capsules per day.

2.What's the similarity of the two experiments?

A. Both use high-level flavones capsules.

B. The number of the subjects is the same.

C. Drinks and placebos are used in both experiments.

D. The subjects are divided into two groups in both experiments.

3.Why will Dr. Manson carry out the four-year study?

A. To prove the first experiment is wrong.

B. To carry out the experiment further.

C. To test how much flavones can improve our memory.

D. To show eating chocolate is better to improve memory.

4.What can we learn from the last paragraph?

A. It’s not necessary for us to eat chocolate.

B. The more we eat flavones, the better our health will be.

C. In the future we can get flavones without eating chocolate.

D. It’s easy for people to get the same level of flavones given to the test subjects.

Helping others is a habit, ___ you can learn even at an early age.

A. it B. that

C. what D. one

The scientists observed that the more junk food the rats ate, the more they wanted to eat – a behavior very similar to that of rats addicted(上了瘾的) to heroin, a dangerous drug. Johnson said the experiment shows that the brain chemistry of obesity(肥胖) and drug addiction may be quite similar.

In their experiment, Johnson and his team studied the “pleasure center” of rats’ brains. The pleasure center is a complicated network of nerve cells. If the animal exercises or eats, the cells reward the animal by releasing chemicals into the body that make it feel good. And when the body feels good, the animal – or person – will want to do the behavior again.

For the experiment, Johnson fed foods like cheesecake to one group of rats. Food like this is high in calories and fat. Another group of rats got a regular diet. The rats that ate junk food started to eat more and more.

“They’re taking in twice the amount of calories as the control rats,” says Paul Kenny, one of Johnson’s colleagues.

Kenny and Johnson wanted to know what was going on in the brains of these rats. They first designed a way to deliver a small electrical charge to the rats’ brains. This electrical charge would stimulate the pleasure centers to release pleasure-causing chemicals. The rats could control how much stimulation – and how much pleasure – they received by running on a wheel. The more the rat ran, the more pleasure it received.

The rats that had been eating junk food started running more and more. This behavior suggested that the junk-food-eating rats needed more brain stimulation to feel good compared with rats on a normal diet. In other words, their pleasure centers were becoming less sensitive and the junk food didn’t make them feel good unless they ate more and more.

Experiments like this one could help scientists understand how chemicals in the brain contribute to obesity. With that information, they may be able to help people avoid obesity in the first place.

(Note: Answer the questions or complete the statements in NO MORE THAN TEN WORDS.)

1.The scientists suggested it was actually ___________________ that made the rats feel good.

2.How did the scientist know what was happening in the brains of the junk-food-eating rats?

3.What was the purpose of the experiment mentioned in the article?

Tony is a quiet boy and he is accustomed ______ at meals, which is always appreciated.

A. not to talk B. to not talk

C. to not talking D. not to talking

Dad was not only my best friend, but my compass (指南针)．While he was alive, he ____ me with his actions and advice. He taught me one important ____：“Believe in yourself.”

If there was one phrase my dad ____ liked to hear, it was “I can't.” He did not have chance to finish high school and ____ two jobs to support his large family, ____ he never complained. Through self-education and years of hard work, my dad became an excellent journalist.

When I was in high school, I had a ____ time with math. He tried to help me, but I ____ struggled. So my math teacher suggested I meet with him at 7：00 each morning before school for ____ help. I told Dad, “That's ____！ I'm tired! I can't do that！” He replied, “You're doing it. I'll send you to school.” Every morning at 6：45, we'd leave the ____.Despite (尽管) working 12 hours every day, Dad never once ____ driving me to school.

After months of ____， I was facing the final exam. I was so ____.On the day of the final, my dad hugged me and said, “Luke, ____ yourself. You can do it.” His words made me realize I needed to trust in my ____ and in the hours of work I'd ____.When I got my ____ proudly, the first person I called was my father. He cried, “Yes! You deserved it！”

Even now, whenever I ____ that a task is too much for me, I think back to that exam. No matter how ____something is, if you're willing to work, you can succeed. I'm forever ____ to Dad for that lesson.

1.A. understood B．forgave C．guided D．impressed

2.A. history B．lesson C．skill D．language

3.A. always B．almost C．ever D．never

4.A. took B．lost C．left D．finished

5.A. so B．or C．but D．and

6.A. good B．free C．terrible D．short

7.A. still B．nearly C．hardly D．probably

8.A. real B．practical C．immediate D．extra

9.A. wonderful B．crazy C．expensive D．necessary

10.A. house B．school C．office D．farm

11.A. suggested B．risked C．enjoyed D．missed

12.A. meeting B．testing C．learning D．interviewing

13.A. excited B．nervous C．happy D．shocked

14.A. stand for B．hold back C．believe in D．look after

15.A. teacher B．luck C．time D．ability

16.A. wasted B．ignored C．picked up D．put in

17.A. answer B．grade C．pay D．gift

18.A. hope B．forget C．worry D．promise

19.A. different B．important C．hard D．interesting

20.A. grateful B．sorry C．polite D．useful

Generally speaking , almost all the kids are ______about how everything around them works.

A. curious B. careful

C. anxious D. excited

Everyone is different and that is ________ makes our world so much better.

A. that B. which

C. what D. who

______, tears came to her eyes.

A. Reading the letter

B. While reading the letter

C. As she was reading the letter

D. To read the letter

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