题型：任务型阅读 题类：常考题 难易度：困难
江苏省七校联盟2018-2019学年高二上学期英语期中考试试卷
Why Is Recycling Important?
When you throw things away, you might be very glad to do it. Unfortunately, that's not the end of the story. The things we throw away have to go somewhere－usually they go off to be buried underground in a landfill (垃圾填埋) or burnt in an incinerator (焚化炉). Landfills can be terribly polluting. They look awful, they smell terrible, they take up space that could be used for better things, and they sometimes create harmful soil and water pollution that can kill fish in our rivers and seas.
One of the worst things about landfills is that they're wasting a huge amount of useful material. It takes a lot of energy and a lot of resources to make things, and when we throw those things in a landfill, at the end of their lives, we're also saying goodbye to all the energy and resources instead of burying it in landfills. That certainly has advantages: it reduces the amount of waste that has to be buried and we can get useful energy from it. But it can also produce harmful air pollution, and burning almost anything adds to the problem of global warming and climate change.
The trouble is, we're all in the habit of throwing things away. In the early part of 20th century, people used materials much more wisely－especially in World War Ⅱ, but in recent decades we've become a throwaway society. We tend to buy new things instead of getting old ones repaired. A lot of men use single-use razors (剃须刀), for example, instead of buying reusable ones, while a lot of women wear single-use stockings. Partly this is to do with the great convenience of throwaway items. It's also because they're cheap. But wasteful period in our history is coming to an end.
We're finally starting to realize that our lifestyle is creating problems for future generations. Earth is soon going to be running on empty if we carry on as we are. Americans have a much richer life than almost anyone else on Earth. What happens when people in developing countries such as India and China decide they want to live the same way as us? According to the environmentalists, we'd need two Earths to satisfy all their needs.
Why Is Recycling Important | |
Ways to deal with rubbish | •Bury rubbish underground in a land fill. •rubbish in an incinerator. |
Disadvantages of the landfill | •It looks terrible and smells bad. •It too much space which could be put to better use. •It pollutes soil and water. •Large amounts of materials are wasted. |
The advantages and disadvantages of burning rubbish | •The waste that needs to be buried is after burning. •It can useful energy. |
•It causes air pollution. •It has a bad on global warming and climate change. | |
The problem | •People are used to things away. •Both men and women prefer single-use products because they are and more convenient. |
The writer's concern | •The lifestyle of Americans now will create a for future generation. •If people all over the world their lives in the same way as Americans, the Earth will be ruined very quickly. |
Every animal sleeps,but the reason for this has remained foggy. When lab rats are not allowed to sleep, they die within a month.{#blank#}1{#/blank#}
One idea is that sleep helps us strengthen new memories. {#blank#}2{#/blank#} We know that, while awake,fresh memories are recorded by reinforcing (加强)connections between brain cells, but the memory processes that take place while we sleep have been unclear.
Support is growing for a theory that sleep evolved so that connections between neurons(神经元)in the brain can be weakened overnight, making room for fresh memories to form the next day. {#blank#}3{#/blank#}
Now we have the most direct evidence yet that he is right. {#blank#}4{#/blank#} The synapses in the mice taken at the end of a period of sleep were 18 per cent smaller than those taken before sleep,showing that the connections between neurons weaken while sleeping.
If Tononi's theory is right, it would explain why, when we miss a night's, we find it harder the next day to concentrate and learn new information —our brains may have smaller room for new experiences.
Their research also suggests how we may build lasting memories over time even though the synapscs become thinner. The team discovered that some synapses seem to be protected and stayed the same size. {#blank#}5{#/blank#} “You keep what matters,” Tononi says.
A. We should also try to sleep well the night before. B. Ti's as if the brain is preserving its most important memories. C. Similarly, when people go for a few days without sleeping, they get sick. D. The processes take place to stop our brains becoming loaded with memories. E. That's why students do better in tests if they get a chance to sleep after learning. F. “Sleep is the price we pay for learning,” says Giulio Tononi, who developed the idea. G. Tononi's team measured the size of these connections, or synapses, in the brains of 12 mice. |
Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided. {#blank#}1{#/blank#}
Write it out
You can also check a math problem by writing everything out on paper. {#blank#}2{#/blank#} Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.
{#blank#}3{#/blank#}
Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether or not your answer is the correct one.
Plugging in
You may find that a variable isn't good enough or have a problem where you have to solve for a variable (变量). {#blank#}4{#/blank#} This is the only real way to assure yourself that the answer you've found is correct.
Check for a reasonable answer
{#blank#}5{#/blank#} For example, if you get an answer in the millions and you know it should be in the thousands, you've likely misplaced a point. Go back through the work on your paper to make sure all of your formulas and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you've got on the first try.
A. Do the opposite B. Correct the answers C. Plug the variable in the equation (方程) to check it out. D. Therefore you'll improve your grades, as well as your math skills. E. It also helps you to figure out everything after you have already finished the test. F. If the result of a problem seems to make no sense, it indicates that the answer is incorrect. G. This helps you to know what information you have and what information you need to solve. |
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