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LSAT SET 24, SECTION I, 18,
18. In recent years the climate has been generally cool in northern Asia. But during periods when the average daily temperature and humidity in northern Asia were slightly higher than their normal levels the yields of most crops grown there increased significantly. In the next century, the increased average daily temperature and humidity attained during those periods are expected to become the norm. Yet scientists predict that the yearly yields of most of the region's crops will decrease during the next century.
Which one of the following, if true, most helps to resolve the apparent paradox in the information above?
(A) Crop yields in southern Asia are expected to remain constant even after the average daily temperature and humidity there increase from recent levels.
(B) Any increases in temperature and humidity would be accompanied by higher levels of atmospheric carbon dioxide, which is vital to plant respiration.
(C) The climate in northern Asia has generally been too cool and dry in recent years for populations of many crop insect pests to become established.
(D) In many parts of Asia, the increased annual precipitation that would result from warmer and wetter climates would cause most edible plant species to flourish.
(E) The recent climate of northern Asia prevents many crops from being farmed there during the winter.
KEY: C。感觉C一定是答案。但是C的方向和文章方向是反的呀。C说太冷和太干，所以不利于INSECT PESTS生长。可是文章中说，气候回到了正常，就是又变得COOL了，但是产量却下降（本身文章的逻辑我就觉得有些迷惑，这有什么矛盾的？不是很正常？），可是INSECT PESTS对产量的影响也在下降呀。WHY？但是C太象答案了。 |
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发表于 2003-9-5 05:38:00
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