Question

TPO 21 阅读第1篇 第10题How is the ...为什么答案是A?

10. How is the problem that the surface may sink related to the problem that water heated geothermally may contain toxic materials?A. Both problems could be solved by returning groundwater that is removed from an underground heat reservoir back to the reservoir after heat is extracted from it.B. The problem of sinking is more difficult to solve than is the problem of toxic materials.C. Land at the surface sinks because the rock beneath the surface is weakened when salts and toxic materials are removed from it in the process of extracting geothermal energy.D. Both problems are caused by the fact that the hot groundwater in a heat reservoir dissolves the rock, which weakens the rock and makes the water toxic with salt.

Answer 1

该段是在说 geothermal energy 带来的问题。原文第二句说如果地表水不能被 replaced 就会造成地面塌陷，最后一句又说如果不把地下水补充回去就会有 disposal 问题，所以选项 A 说法正确。两个问题之间是并列关系，作者既没有对其进行比较也没有说它们是因果关系，所以 B 和 C 都不对。D 选项中的 dissolves the rock 和 weakens the rock 不对，原文只是说 dissolved from the hot rock。