题目内容
People talk about energy everywhere. Green energy, for example. Then, energy independence. It has a nice ring to it. Doesn’t it? If you think so, you’re not alone, because energy independence has been the dream of American president for decades, and never more so than in the past few years, when the most recent oil price shock has been partly responsible for kicking off the great recession(经济衰退).
"Energy independence" and its rhetorical(修辞的) companion "energy security" are, however, unreliable concepts that are rarely thought through. What is it that we want independence from, exactly?
Most people would probably say that they want to be independent from imported oil. But there are reasons that we buy all that oil from elsewhere.
The first reason is that we need it to keep our economy running. Yes, there is a trickle(涓涓细流) of biofuel(生物燃料) available, and more may become available, but most biofuels cause economic waste and environmental destruction.
Second, Americans have basically decided that they don’t really want to produce all their own oil. They value the environmental quality they preserve over their oil imports from abroad. Vast areas of the United States are off-limits to oil exploration and production in the name of environmental protection. To what extent are Americans really willing to tolerate the environmental influence of domestic(国内的) energy production in order to cut back imports?
Third, there are benefits to trade. It allows for economic efficiency, and when we buy things from places that have lower production costs than we do, we benefit. And although you don’t read about this much, the United States is also a large exporter of oil products, selling about 2 million barrels of petroleum products per day to about 90 countries.
There is no question that the United States imports a great deal of energy and, in fact, relies on that steady flow to keep its economy stable. When that flow is interrupted, we feel the pain in short supplies and higher prices. At the same time, we get massive economic benefits when we buy the most affordable energy on the world market and when we engage in energy trade around the world.
1.What does the author say about energy independence for America?
A. It sounds very attractive.
B. It ensures national security.
C. It will bring oil prices down.
D. It will protect the environment.
2.Why does America rely heavily on oil imports?
A. It wants to expand its storage of raw oil.
B. Its own oil reserves are quickly running out.
C. Its own oil production falls short of demand.
D. It wants to keep its own environment untouched.
3.What does the author say about oil trade?
A. It improves economic efficiency.
B. It makes for economic recession.
C. It brings benefit only to the sellers.
D. It saves the cost of oil exploration.
4.What is the author’s purpose in writing the passage?
A. To explain the increase of international oil trade.
B. To raise Americans' awareness of the energy crisis.
C. To argue for America’s dependence on oil imports.
D. To stress the importance of energy protection.
1.A
2.D
3.A
4.C
【解析】
试题分析:能源是世界各地的人们都会谈论到的问题。各个国家都想实现能源独立,美国也不例外。但是,美国的能源严重依赖进口。美国这样做是有原因的,美国需要能源来维持经济的运转;美国所需要的能源不会全部依靠国产,因为美国更看重对环境的保护;进行能源交易能够提高经济效率。
1.because energy independence has been the dream of American president for decades”可知,能源独立一直都是美国的梦想,说明能源独立对美国很有吸引力,故选A。
2.they don’t really want to produce all their own oil”可知,美国只生产部分石油,其余依靠进口,排除D;根据第五段“Vast areas of the United States are off-limits to oil exploration and production in the name of environmental protection.”可知,美国为了保护环境,禁止大面积开采石油,由此可知,美国国内的石油供应不足,只能依赖进口,故选D。
3.there are benefits to trade. It allows for economic efficiency”可知,石油交易会带来一定的好处,它有助于提高经济效率,故选A。
4.But there are reasons that we buy all that oil from elsewhere.”和下面三段的首句“The first reason is that we need it to keep our economy running. ...Second, Americans have basically decided that they don’t really want to produce all their own oil. ...Third, there are benefits to trade. It allows for economic efficiency...”及最后一段“At the same time, we get massive economic benefits when we buy the most affordable energy on the world”可知,文章主要讲的是美国能源依赖进口的原因,故选C。
考点:社会类短文阅读
Until just a few years ago,we doctors believed that the brain stopped making new neural(神经系统的)connections (meaning that your memory began to get worse)when the body stopped developing,usually in your early 20s. And we knew that,like any other body part,neurons weaken as we age. Loss of brain function due to neural breakdown was assumed to be a normal,unavoidable part of aging.
It turns out that we were wrong. In the past few years,it has been discovered that you can,in fact,make new neurons starting in your 20s and continuing well into old age. You can literally rewire the brain with new parts as the older parts wear out. How?Simple:Keep learning. Just as your body can pack on and condition new muscle,your brain can rebuild used-up neurons.
How strong is the evidence for this?Strong enough that a $200 million industry devoted to brain boosting software (products like Brain Age,MindFit,and Lumosity that supposedly improve your memory function)has sprung up out of nowhere. All“mental fitness”means are keeping your memory intact(everything from phone numbers to how to throw a football).So what can you do to stay smart?
Keep blood pressure down. People with high blood pressure are more likely to develop cognitive impairment later in life.
Eat more vitamins. Like E(in nuts and sunflower seeds),B6 and B12(beef,tuna),and folic acid(leafy greens,citrus,berries),which help keep your brain’s chemistry in balance.
Exercise your brain. This is the best way to rebuild and strengthen those precious neurons. Learn to play chess or the guitar. When you’re at a stoplight,try to recall the starting lineup of the 1983 Celtics. See a movie that doesn’t feature Ben Stiller. Or read,like,a book.
Title:How to keep the1.________smart?
Previous 2._________ | The brain no longer makes new neural connections once the 3.________ of one’s body has stopped. |
New 4. ________
| ●New neurons continue to occur even in one’s old age. ●5.________contributes to the development of the new parts of your brain. ●Many products which claim to improve your brain function appear in the 6._________. |
7._________ | ●Keep yourself away from 8._________blood pressure. ●9._________in more vitamins for the needs of your brain. ●10.________your brain as much as you can. |