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托福阅读句子简化题：Maya Water Problems

2015-08-18 17:00:00来源：网络

　　【托福阅读题型：Maya　Water Problems句子简化题】托福阅读中句子简化题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

　　查看全部：托福阅读题型分类练习之句子简化题

　　托福阅读句子简化题：Maya　Water Problems

　　【Paragraph 4】How did those dense southern Maya populations deal with the resulting water problem? It initially　surprises us that many of their cities were not built next to the rivers but instead on high terrain in rolling uplands. The　　explanation is that the Maya excavated depressions, or modified natural depressions, and then plugged up leaks in　　the karst by plastering the bottoms of the depressions in order to create reservoirs, which collected rain from large　plastered catchment basins and stored it for use in the dry season. For example, reservoirs at the Maya city of Tikal　held enough water to meet the drinking water needs of about 10,000 people for a period of 18 months. At the city of　Coba the Maya built dikes around a lake in order to raise its level and make their water supply more reliable. But the　inhabitants of Tikal and other cities dependent on reservoirs for drinking water would still have been in deep trouble if 18　months passed without rain in a prolonged drought. A shorter drought in which they exhausted their stored food supplies　might already have gotten them in deep trouble, because growing crops required rain rather than reservoirs.(Maya　Water Problems)

　　Which of the sentences below best expresses the essential information in the highlighted sentence in the　passage? Incorrect choices change the meaning in important ways or leave out essential information.

　　○Southern Maya populations obtained the water they needed for the dry season by collecting and storing　rainwater in sealed depressions.

　　○The Maya are credited with creating methods for modifying natural rainwater and storing it.

　　○Leaks in the karst caused difficulties in the creation of reservoirs, which were needed to store water for the dry　season.

　　○Southern Mayans were more successful at collecting rain than storing it during dry seasons

　　答案见下一页：

本文关键字: 托福阅读题型 托福阅读训练 句子简化题

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