题目内容

10._____the flight has been cancelled because of bad weather,we might as well go by train.(  )
A.AfterB.AlthoughC.Now thatD.As soon as

分析 既然航班因为天气不好已经被取消了,那么我们不妨坐火车去吧.

解答 答案:C
句意表达的是原因,引导原因状语从句;after之后,although尽管,now that既然,由于,as soon as一…就…;根据句意,故选C.

点评 从属连词是连词的一种,用来引导名词性从句和状语从句.大致可分为三大类:that(无词义,不做成分)if,whether (表达是否的意义,但不做句子成分); 连接代词:who,whom,whose,what,which,whatever,whoever,whichever(有词义,在句子中可作主语、表语、宾语);连接副词:when,where,why,how,how many,how long,how far,however,whenever,wherever (有词义,作从句的状语).学习时,要注意区分和掌握.

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6.In the United States,30 percent of the people have a"weight problem".To many people the cause is obvious (明显的):they eat too much.But scientific evidence (证据) does little to support this idea.Going back to America of 1910,we find that people were thinner than today,yet they ate more food.In those days people worked harder physically,walked more,used machines much less,and didn't watch television.
Several modern studies,moreover,have shown that fatter people don't eat more on average than thinner people.A 1979 study of 3,545 London office workers showed that fat people eat less than slim (苗条的) people.
Studies also show that slim people are more active than fat people.A study by a research group at Stanford University found the following interesting facts:
The more the man ran,the greater loss of the body fat.
The more they ran,the greater increase in food intake.
Thus,those who ran the most ate the most,yet lost the greatest amount of body fat.
29.Nowadays many Americans have the problem thatC.
A.they are too slim              
B.they work too hard
C.they are too fat           
D.they lose too much body fat
30.According to the passage,how many people in 900 Americans have a"weight problem"?D
A.150.B.300.C.600.D.270.
31.Is there any scientific evidence to support the idea that eating too much is the cause of a"weight problem"?C
A.Yes,there is plenty of evidence.
B.Of course,there is some evidence to support this.
C.There is hardly any scientific evidence to support this.
D.We are not sure.
32.The Americans in 1910A.
A.ate more food and had more physical activities
B.ate less food but had more physical activities
C.ate less food and had less physical activities
D.had more problems.
3.The Israeli farmers who pioneered the revolutionary technology known as drip irrigation weren't trying to solve  one of the world's most urgent problems.They were just trying to survive.They lived in the desert,and they didn't have enough water to grow their crops.
In its simplest form,it was little more than a pipe with holes in it.But behind each hole was a hi-tech dripper that let out just the fight amount of water.Snaked along a row of crops so that the holes were positioned directly above the roots,the pipe could direct each precious drop of water directly to the plants,getting a bigger harvest while using a very small amount of the water.
Over time,the farmers improved upon the technology,perfecting the drippers that regulated the flow of water,and connecting the pipelines to computers that could determine exactly how much water each plant needed and when.
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