网址：http://m.1010jiajiao.com/timu_id_2354874[举报]
The little island of Symi had a big party not long ago. Everyone sang and danced in the streets. Bells rang. Flags waved.
What was it all about?
For the first time, this island of Greece had its own fresh water. Women could fill their pails with all the water they wanted!
Very little rain falls on Symi. The people have always saved every drop they could get. But it has never been enough for their needs. They have had to buy water brought by ships.
Now Symi has its own “water factory. ” The factory changes salt water from the sea into fresh water that people can drink.
Most of the ways to turn salt water into fresh cost a lot of money. The Symi factory uses a way that costs very little.
What is the factory like? How does it work?
Right in the middle of the town are some long ponds (池塘).
Over each pond is a low tent. It is made of plastic that you can see through.
At night, sea water is pumped (抽) into the ponds. The next day, the hot sun shines through the tents. The sun's heat turns the water into vapor that rises from the ponds. The salt is left behind.
As it rises, the vapor becomes mist (轻雾). On the inside of each tent, the tiny drops of mist run together to make big drops. These run down the sides of the tent, filling a tank (桶) with fresh water.
The salt left behind in the ponds is washed out each night.Then more sea water is pumped in, The factory is, ready for the next day's work.
The tents and other parts of the factory cost very little. Sea water and sun cost nothing. Most people on Symi are poor. So to them this new way of getting fresh water seems wonderful!
1．The people on that Greek island held the big party because of ________ .
[ ]
A．their National Day
B．the harvest of the year
C．having fresh water of their own
D．drinking fresh water for the first time
2．From the story, we know that there might be a time for the people on the island ________ .
[ ]
A．to drink no fresh water at all
B．not to get enough fresh water as they wanted
C．to drink salt sea water most of the time
D．not to get any kind of water all their lives
3．Which of the following sentences is NOT true?
[ ]
A．The people on the island had been saving rain water.
B．The people on the island had bought water for drinking.
C．The people on the island have found many ways to make fresh water.
D．The people on the island have had a “water factory” of their own.
4．Water vapour is made in the factory by ________ .
[ ]
A．heating sea water by the sun
B．boiling sea water in the ponds
C．pumping sea water out of the ponds
D．filling the ponds with fresh water
5．________ in the ponds is washed out during the night.
[ ]
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
阅读并按要求做题。
Trees are useful to men in three important ways： 1 , they give them shade, and they help to prevent drought and floods(防止洪水与干旱)．
Unfortunately, in many parts of the world, men have not realized(意识)that the third of these is the most important．In their eagerness(渴望)to make money from trees, 2 , only to find that without them they have lost the best friends they had．And also 3 , so many trees are slowly gone．
This doesn’t not only mean that men will have fewer trees．The results(结果)are even more serious： 4 , their roots(树跟)break up soil——having the rain go in——and also bind(固定)the soil(土壤), thus stopping it from being washed away easily; 5 , the rain falls on hard ground and runs away, causing floods and carrying away the rich top-soil．
A．some people have cut trees down in large numbers
B．but where there are no trees
C．they provide(供给)them with wood
D．they are usually too careless to plant and look after new trees
E．for where there are trees
6．Which is the best title of the passage?________
A．Planting More Trees
B．The Problems of Trees
C．Never Cut Down Trees
D．The importance of Trees
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||