The weather in this area is so changeable that people can even experience four seasons in a day．题目和参考答案——青夏教育精英家教网—

题目内容

6．The weather in this area is so changeable that people can even experience four seasons in a day．

分析这个区域的天气非常多变以致于人们甚至可以在一天之内经历四季．

解答 77．changeable changeable是形容词，意为"常变化的，易变的"，这里是so…that…引导的结果状语从句，表示"如此…以致于…"，so后加形容词．

点评考查形容词的词义．在熟知单词词义的基础上要注意词性的修饰．

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17．Early one morning，more than a hundred years ago，an American inventor called Elias Howe finally fell asleep．He had been working all night on the design of a sewing machine but he had run into a very difficult problem：It seemed impossible to get the thread to run smoothly around the needle．
Though he was tired，Howe slept badly．He turned and turned．Then he had a dream．He dreamt that he had been caught by terrible savages whose king wanted to kill him and eat him unless he could build a perfect sewing machine．When he tried to do so，Howe ran into the same problem as before．The thread kept getting caught around the needle．The king flew into the cage and ordered his soldiers to kill Howe．They came up towards him with their spears raised．But suddenly the inventor noticed something．There was a hole in the tip of each spear．The inventor awoke from the dream，realizing that he had just found the answer to the problem．Instead of trying to get the thread to run around the needle，he should make it run through a small hole in the center of the needle．This was the simple idea that finally made Howe design and build the first really practiced sewing machine．
Elias Howe was not the only one in finding the answer to his problem in this way．
Thomas Edison，the inventor of the electric light，said his best ideas came into him in dreams．So did the great physicist Albert Einstein．Charlotte Bronte also drew in her dreams in writing Jane Eyre．
To know the value of dreams，you have to understand what happens when you are asleep．Even then，a part of your mind is still working．This unconscious（无意识的），but still active part understands your experiences and goes to work on the problems you have had during the day．It stores all sorts of information that you may have forgotten or never have really noticed．It is only when you fall asleep that this part of the brain can send messages to the part you use when you are awake．However，the unconscious part acts in a special way．It uses strange images which the conscious part may not understand at first．This is why dreams are sometimes called"secret messages to ourselves"．
29According to the passage，Elias Howe wasC．
A．the first person we know of who solved problems in his sleep
B．much more hard-working than other inventors
C．the first person to design a sewing machine that really worked
D．the only person at the time who knew the value of dreams
30．The problem Howe was trying to solve wasD．
A．what kind of thread to use
B．how to design a needle which would not break
C．where to put the needle
D．how to prevent the thread from getting caught around the needle
31．Thomas Edison is spoken of becauseB．
A．he also tried to invent a sewing machine
B．he got some of his ideas from dreams
C．he was one of Howe's best friends
D．he also had difficulty in falling asleep
32．Dreams are sometimes called"secret messages to ourselves"becauseA．
A．strange images are used to communicate ideas
B．images which have no meaning are used
C．we can never understand the real meaning
D．only specially trained people can understand them．

14．I must make anapology （apologize） to him for not going to his party．

1．The relationship between exercise and cancer has long both intrigued and puzzled oncologists and exercise physiologists．
Exercise is strongly associated with lowered risks for many types of cancer．At the same time，exercise involves biological stress，which typically leads to a short-term increase in inflammation（发炎） which can contribute to higher risks for many cancers．
Now，a new study in mice may offer some clues into the exercise-cancer paradox．It suggests that exercise may change how the immune system deals with cancer by boosting adrenaline（肾上腺素），certain immune cells and other chemicals that，together，can reduce the severity of cancer or fight it off altogether．
To try to better understand how exercise can both elevate inflammation and simultaneously protect the body against cancer，scientists at the University of Copenhagen in Denmark and other institutions decided to closely examine what happens inside mice at high risk for the disease．
So，for the new study，they began by gathering a group of adult lab mice．These animals generally like to run．
The scientists then implanted melanoma（黑素瘤） skin cancer cells into the mice before providing half of them with running wheels in their cages while the other animals remained sedentary．After four weeks，far fewer of the runners had developed full-blown melanoma than the sedentary mice and those that had been diagnosed with the disease showed fewer and smaller lesions．
They drew blood from both the exercising and sedentary animals and cells from any tumors in both groups．As expected，they found much higher levels of the hormone adrenaline in the blood of the exercising animals，especially right after they had been working out on the wheels but also at other times of the day．The body releases adrenaline in response to almost any type of stressful experience，including exercise．
They also found higher levels of interleukin-6in the blood of the runners．This is a substance that is released by working muscles and is believed to both increase and decrease inflammation in the body，depending on where and how it goes to work．
Perhaps most important，they found much higher numbers in the bloodstreams of runners than in the sedentary mice of a type of immune cell named natural killer cells that are known to be strong cancer fighters．
So the scientists repeated their original experiment multiple times，inducing cancer while allowing some mice to run and others to sit．In some of these follow-up experiments，the scientists injected the runners with a substance that blocked the production of adrenaline and gave sedentary animals large doses of added adrenaline．
What they now found was that when running mice could not produce adrenaline，they developed cancer at the same rate as the sedentary animals，while the sedentary animals that had been injected with extra adrenaline fought off their tumors better than other sitting mice．
More remarkably，the scientists determined that adrenaline seemed to be sending biochemical signals to some of the animals'IL-6cells，making them physiologically more alert，so that when a tumor began to develop in the affected animal，those IL-6cells in turn activated the natural killer cells in the bloodstream and actually directed them to the tumors，like minute guide fish．
With these results，"we show that voluntary wheel running in mice can reduce the growth of tumors，and we have identified an exercise-dependent mobilization of natural killer cells as the underlying cause of this protection，"said Pernille Hojman，a researcher at the University of Copenhagen who oversaw the new study．It perhaps provides one more incentive for us to get up and move．
58．In the first experiment，which one is the most important result the scientists found？A
A．natural killer cells are much more in the bloodstreams of runners than in the sedentary mice．
B．levels of interleukin-6are higher in the blood of the runners than in the sedentary mice．
C．exercise such as running seemed to help the mice fight against the cancer．
D．adrenaline can reduce the severity of cancer or fight it off．
59．In the follow-up experiments，the scientists foundB？
A．the hormone adrenaline has much higher levels in the blood of the exercising animals，
B．how these elements in the runners-their increased adrenaline，IL-6，and natural killer immune cells fight against tumor．
C．interleukin-6can both increase and decrease inflammation in the body，depending on where and how it goes to work．
D．what happens inside mice at high risk for the disease．
60．According to the study，we can infer the fundamental substance to fight the cancer off isC
A．adrenaline
B．interleukin-6
C．natural killer cells
D．genes．

11．Theadvances（进步） in science and technology have brought people a lot of convenience．

18．假设你是李华，由于母亲在北京住院，所以你无法参加美国朋友约翰（John）本周六下午的生日聚会．请你给他写一封电子邮件表示歉意，内容包括：
1．表达歉意；  2．说明原因；  3．送上祝福．
注意：（1）词数100左右；（2）可以适当增加细节，以使行文连贯；
（3）邮件的开头和结尾已经给出，但不计入总词数．
Dear John，
How is everything going with you？

                                                    Best wishes，
Li Hua．

15．随着人们生活水平的提高，私家车的数量逐年增加，但随之而来的塞车问题日益严重．假设你是学校学生会主席李华，请给校报的英语专栏写一篇英语稿件，建议学生们尽量骑自行车出行，内容如下：
1．现象（phenomenon）：由于家长接送学生造成学校周边交通阻塞的问题非常严重．
2．建议：选择环保的出行方式-骑车．
理由：a．减轻交通压力；b．减少噪音和空气污染；c．锻炼身体．
3．改善交通，从我做起．
注意：
（1）可适当加入细节信息，以使行文连贯；
（2）短文字数：不少于100字．
Dear boys and girls，
I am Li Hua，chairman of the students'union．It is a common phenomenon that

Yours Truly，
Li Hua．

16．bond纽带；联系；关系；契合．

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