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  3. For centuries Dutch engineers have been fighting a war against water. Their main enemy is the sea. A large part of the country i

For centuries Dutch engineers have been fighting a war against water. Their main enemy is the sea. A large part of the country i

admin2018-09-25  22
问题     For centuries Dutch engineers have been fighting a war against water. Their main enemy is the sea. A large part of the country is below sea level. In fact, Holland is also called the "Netherlands" which means "low land". Very tall and strong walls, called dykes, have built to keep out the sea. But in very rough weather the sea may suddenly burst through a dyke. Great damage can be caused by floods when this happens.
    Three large rivers are also part of the problems. These rives are the Rhine, the Maas and the Scheldt. They follow through the Holland into the North Sea. They have cut many passages across the country. At low tides, the rivers flow into the sea as usual. But at high tide, the sea can flow into the rivers! This is because the land is so low.
    The battles against the water never end, hut they made Holland a bigger and bigger country. In order to prevent floods, the engineers take or reclaim land that was under water. The Dutch have been reclaiming land for seven hundred years.
    Land is usually reclaimed from a passage between islands, two dykes are built across the passage, so they block the water between them. Then the engineers dig long canals and pump the water into them. At low tide, the canals empty the water into the sea.
    Because the land is so low, water from the sea and rivers can rise up through the ground. For this reason, the pumps continue working even the land has been drained(that is, when the water has been pumped away). The dykes contain gates, and through these water is pumped out. In many parts of Holland, pumps must be working all the time. If they stopped, there will be very bad floods.
If pumps stop working there will be very bad floods because______.
选项 A、the water will run back at high tide
B、the sea may break the dykes in rough weather
C、the battle against water will never end
D、the land is too low and water can rise up through the drained land
答案D
解析 本题为细节推理题，提问的是如果抽水泵停止工作就会发生严重洪水的原因是什么。根据文章最后一段开头“Because the land is so low，water from the sea and rivers can rise upthrough the ground．For this reason，the pumps continue working．．．”可知，由于陆地太低，海水和河水会上涨并漫过陆地。正是因为这一原因，抽水泵才不停地工作，因此答案为D)．
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