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题目材料:

According to the passage, which of the following is true of the water management systems in the central and southern Maya Lowlands?
  • AThey were implemented in part because of the prevailing pattern of rainfall.
  • BThey were an integral part of lowland cities` architecture.
  • CThey were needed because of insufficient resources such as ponds, rivers and lakes in the lowlands.

A,B,C显示答案

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