問題詳情

第 9 題至第 12 題為篇章結構，各題請依文意，從四個選項中選出最合適者，各題答案內容不重複     It has taken humans a while to realize that our idea of normal changes as our understanding of history deepens.Climate is a case in point. 9 In the American Southwest, climatologists have found a surprisingly detailed recordof weather patterns—especially patterns of moisture—in tree rings that show that prolonged periods of drought in thatregion are normal.      Those findings immediately raise questions about how water is being used in the Southwest, and particularlyabout the Colorado River Compact, the 1922 legal agreement that governs water distribution in the vast ColoradoRiver basin. The agreement was based on two decades of measuring river flows. 10     This evidence and its implications have been gathered in a report released by a committee of the NationalResearch Council. 11 The Colorado River basin itself—some 240,000 square miles across the West andSouthwest—has experienced staggering population growth. Precipitation patterns are changing, in part because ofglobal warming, and the spring runoff from snowpack in the mountains takes place earlier than it used to, which meansthat less water is stored for later in the season. 12 That means that the only new water source for residential andcommercial growth is water that has been allocated to agriculture. So what is normal? Vast quantities of water devotedto subsidized agriculture? Vast quantities of water devoted to the growth of cities and suburbs that are, in the longhistorical view, unsustainable?
9
(A)Scientists change their minds as the evidence they gather becomes more precise and more conclusive.
(B)The conclusions are stark.
(C)Nearly every drop of water that flows downstream is already allocated.
(D)Over the past couple of decades, climatology has become a deeply historical science.

參考答案

答案：D
難度：適中0.638889
統計：A(4),B(5),C(3),D(23),E(0)

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