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Find out a mistake in the following sentence and correct it(找出句中的错误,并改正):
例:Marx could not only write in English but also in French when
he was in his twenties.
答案:A, could write not only
Mary’s handwriting is( A ) much more better( B ) than any( C ) other student’s( D ).
查看习题详情和答案>>Since the beginning of history, man has been attracted by the idea of living forever, of wining the fight against death and disease. So far, this has only remained a dream, though a very powerful one. Many people have wondered whether it would be possible to find a way to preserve(保存) human bodies, and what would be the best way to preserve human bodies.
It has long been known that meat or fruit can be kept fresh for long periods by freezing; in ancient
However, most living beings that exist under warm conditions die when frozen. This is because of the harmful effects of freezing ice crystals(晶体), which form sharp cutting shapes that harm the cells.
In the 1940s, Dr B.J. Luyet and a group of scientists in
Using living cells from chicken, Luyet and his assistants discovered that they could partly dry the chicken cells, using a mixture of the white part of an egg and glycerin(甘油). Some success was achieved.The chicken cells were dried, frozen for a period of time, and then carefully unfrozen. Almost all the cells recovered when they reached normal temperatures.
Since then, the cooling of whole animals to a temperature very much below freezing point for later unfreezing has become more of a possibility, and the glycerin method would probably be used to do this. When this can be done completely and successfully, science will have moved much closer to its aim of freezing and storing incurable patients until the day they can be cured.
56.The passage is mainly about ___________.
A.the possibility of preserving human bodies by freezing
B.the practice of preserving food by freezing
C.the harmful effects of freezing
D.how to remove water from living cells
57.The idea of freezing human bodies to preserve them ___________.
A.comes from that of keeping meat and fruit fresh by freezing
B.was invented in ancient
C.could hardly be realized by people
D.is widely accepted by the scientific world
58.According to the passage, freezing is___________.
A.the best way of preserving food
B.a way of removing water from living cells
C.a way of realizing the idea of preserving human bodies
D.harmful to living cells and cannot be used to preserve them
59.Glycerin can be used ___________.
A.to freeze only chicken’s living cells
B.to unfreeze living cells
C.to remove water from living cells
D.to change the shapes of crystals
60.The success achieved by Dr Luyet and his helpers was a long step towards ___________.
A.keeping meat or fruit fresh
B.living forever
C.changing the shapes of ice crystals
D.preserving human bodies for long periods
查看习题详情和答案>>读写任务(共1小题;满分25分)
阅读下面的短文,然后按照要求写一篇150词左右的英语短文。
In the atmosphere, carbon dioxide acts rather like a one-way mirror —— the glass in the roof of a greenhouse which allows the sun’s rays to enter but prevents the heat from escaping.
According to a weather expert’s prediction, the atmosphere will be 3℃ warmer in the year 2050 than it is today, if man continues to burn fuels at the present rate. If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several metres and severely flooding coastal cities. Also, the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere, possibly resulting in an alteration of earth's chief food-growing zones.
In the past, concern about a man-made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the weather experts are now paying more attention to West Antarctic, which may be affected by only a few degrees of warming, in other words, by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.
Satellite pictures show that large areas of Antarctic ice are already disappearing. The evidence available suggests that a warming has taken place. This fits the theory that carbon dioxide warms the earth.
However, most of the fuel is burnt in the northern hemisphere, where temperatures seem to be falling. Scientists conclude, therefore, that up to now natural influences on the weather have exceeded those caused by man. The question is: Which natural cause has most effect on the weather?
【写作内容】
1.以约30个词概括短文的要点;
2. 然后以约120个词就“Solutions of slowing climate change”为主题写一篇短文,包括如下要点:
(1) 你认为地球会不会持续变暖;
(2) 其原因是什么以及人类在其中的作用;
(3) 谈谈你的建议。
【写作要求】
(1) 你可以使用实例或者其他论述方法支持你的观点,也可以参照阅读材料的内容,但不得直接引用阅读材料中的句子。
(2) 字迹清楚,书写工整。
【评分标准】 概括准确,语言规范,内容合适,篇章连贯。
第二节 语法填空 (共10小题;每小题1.5分,满分15分)
阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空,并将答案填写在答题卡标号为31~40的相应位置上。
It was a cold and cloudy afternoon. I was on the bus with my children, aged four and two, heading home when it started to rain. I realized this would mean a wet walk home 31 the bus stop.
Home was only two blocks away 32 it was not a pleasant walk with one small boy fast asleep in the pram (手推婴儿车), the other one in a raincoat and no umbrella for myself. A pick-up truck passed us on the road and, a few minutes later, I saw it 33 (pull) back and the driver looking directly at us.
A young man put the window down. “Hey, here’s an umbrella for you --- please take it.” He called out.
I stood there 34 (astonish), barely believing that the man, 35 existence was unknown to me only moments ago, could be so 36 (thought). “Come on, give this to your mummy,” he said to my older son. I gratefully accepted the offer, 37 (thank) him and watched the truck disappear down the road.
This man might have needed the umbrella for 38 later during the day but preferred to give it to me. It was a lesson to me 39 it’s possible to give without expecting anything 40 return.
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读写任务(共1小题;满分25分)
阅读下面的短文,然后按照要求写一篇150词左右的英语短文。
In the atmosphere, carbon dioxide acts rather like a one-way mirror —— the glass in the roof of a greenhouse which allows the sun’s rays to enter but prevents the heat from escaping.
According to a weather expert’s prediction, the atmosphere will be 3℃ warmer in the year 2050 than it is today, if man continues to burn fuels at the present rate. If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several metres and severely flooding coastal cities. Also, the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere, possibly resulting in an alteration of earth's chief food-growing zones.
In the past, concern about a man-made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the weather experts are now paying more attention to West Antarctic, which may be affected by only a few degrees of warming, in other words, by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.
Satellite pictures show that large areas of Antarctic ice are already disappearing. The evidence available suggests that a warming has taken place. This fits the theory that carbon dioxide warms the earth.
However, most of the fuel is burnt in the northern hemisphere, where temperatures seem to be falling. Scientists conclude, therefore, that up to now natural influences on the weather have exceeded those caused by man. The question is: Which natural cause has most effect on the weather?
【写作内容】
1.以约30个词概括短文的要点;
2. 然后以约120个词就“Solutions of slowing climate change”为主题写一篇短文,包括如下要点:
(1) 你认为地球会不会持续变暖;
(2) 其原因是什么以及人类在其中的作用;
(3) 谈谈你的建议。
【写作要求】
(1) 你可以使用实例或者其他论述方法支持你的观点,也可以参照阅读材料的内容,但不得直接引用阅读材料中的句子。
(2) 字迹清楚,书写工整。
【评分标准】 概括准确,语言规范,内容合适,篇章连贯。
查看习题详情和答案>>