The rain since three hours ago. 题目和参考答案——青夏教育精英家教网—

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4. The rain (not stop) since three hours ago.

4. hasn't stopped

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The Antarctic Icecap is the largest supply of fresh water,representing nearly 2% of the world's total fresh and salt water. As can be seen from the table below,the amount of water in our atmosphere is over 10 times as much as the water in all the rivers taken together. The fresh water actually available for hu?man use in lakes and rivers and the accessible ground water amount to only about one third of 1 % of the world's total water supply.

		Surface area (m²)		Volume (m³)		Percentage of total(%)
Salt water
The oceans		139,500,000		317,000,000		97. 2
Inland seas and lakes		270,000		25,000		0. 008
	Surface area (m²)		Volume (m³)		Percentage of total(%)
Fresh water
Freshwater lakes	330,000		30,000		0. 009
All rivers(average level)	―		300		0. 0001
Antarctic Icecap	6,000,000		6,300,000		1. 9
Arctic Icecap and glaciers	900,000		680,000		0. 21
Water in the atmosphere	197,000,000		3,100		0. 001
Ground water within half a mile from surface	―		1,000,000		0. 31
Deep-lying ground water	―		1,000,000		0. 31
Total (rounded)	―		326,000,000		100. 00

1.What's the best title of this passage?

A. Fresh water in the world

B.Protection of the water in the world

C. Salt water of the earth

D. Water supply of the world

2. The fresh water that humans can use is ，

A. about 1,086,700 m³ B. about 6,300,000 m³

C. about 680,000 m³ D. about 2,000,000 m³

3 Where does the majority of fresh water exist?

A. In Arctic Icecap and glaciers.

B. In the Antarctic Icecap.

C. In deep ground.

D. In the atmosphere.

4. What are the two places where equal amount of fresh water is stored?

A. Freshwater lakes and all rivers (average level) .

B. Antarctic Icecap and water in the atmosphere.

C. Ground water within half a mile from surface and deeplying ground water.

D. Deeplying ground water and Arctic Icecap and glaciers.

4. 他爷爷巳经去世三年了。

His grandfather for three years.

Most musicians agree that the best violins were made in Cremona,Italy, about 200 years ago. They even sound better than violins made today. Violin makers and scientists try to make instruments like the old Italian violins. But they aren't the same. Why are these old Italian violins so special? Many people think they have an answer.

Some people think it is the age of the violins. But there is a problem here. Not all old violins sound wonderful. Only those from Cremona are special. So age cannot be the answer.

Other people think the secret to those violins is the wood. The wood of the violin is very important. It must be from certain kinds of trees. It must not be too young or too old. Perhaps the violin makers of Cremona knew some?thing special about wood for violins.

But the kind of wood may not be so important. It may be more important to cut the wood in a special way. Wood for a violin must be cut very carefully. It has to be the right size and shape. The smallest difference will change the sound of the violin. Musicians sometimes think that this is the secret of the Italians.

Size and shape may not be the answer either. Scientists make new violins that are exactly the same size and shape. But the new violins still do not sound as good as the old one. Some scientists think the secret may be the varnish (清漆) ，which covers the wood of the violin and makes it look shiny. It also helps the sound of the instrument. Since no one knows what the Italian violin makers used in their varnish,no one can make the same varnish today.

There maynever be other violins like the violins of Cremona. And there are not many of the old violins left. So these old violins are becoming more and more precious.

5. What would be the best title for the passage?

A. The secrets of Cremona violins

B. The history of Italian violins

C. Special musical instruments

D. How to make the best violins

6. Other people think the Italian violin makers .

A. were lucky

B. did not know much about the violins

C. used many kinds of wood

D. knew something special

7. What is still unclear about Cremona violins according to the writer?

A. The shape. B. The size.

C. The wood. D. The varnish.

8. What can we learn from this passage?

A. Modern things are always better than ancient ones.

B. Ancient things are always better than modern ones.

C. Once a cultural relic is lost,it can never be recovered.

D. Varnish for violins will become more and more precious.

7. There is (充裕的) firewood in the forest.

8. A new type of bigpower relationship should be based on cooperation instead of (竞争) .

4. Oxford is known one of the best universities in the world.

1. The singer and pianist asked to make a speech at the meeting yesterday.

1. According to the company's regulations,being late for 5 times

(mean) that you will be fined by the company.

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