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题库 / GMATAdvanced-CR-47
Letter to the editor: If the water level in the Searle River Delta continues to drop, the rising sea level will make the water saltier and less suitable for drinking. Currently, 40 percent of the water from upstream tributaries is diverted to neighboring areas. To keep the delta’s water level from dropping any further, we should end all current diversions from the upstream tributaries.
Neighboring water utilities are likely to see higher costs and diminished water supplies, but these costs are necessary to preserve the delta.
Which of the following would, if true, indicate a serious potential weakness of the suggested plan of action?
Desalination equipment would allow water from the delta to be used for drinking even it if became saltier.
Water level is only one factor that affects salinity in the delta.
The upstream tributaries’ water levels are controlled by systems of dams and reservoirs.
Neighboring areas have grown in population since the water was first diverted from upstream tributaries.
Much of the recent drop in the delta’s water level can be attributed to a prolonged drought that has recently ended.
题型：a serious potential weakness 削弱题 （削弱plan，也就是削弱题+目标管理题）
削弱方法：他因削弱/ 拆桥削弱/ 不具有可行性、实行起来没有效果、有副作用（目标管理的削弱）
plan方案: end all current diversions from the upstream tributaries.--终止上流直流的分流
goal目标: not stop the 【dropping water level of Delta 】--水位不下降
E. 最相关
Much of the recent 【drop in the delta’s water level 目标 】can be attributed to 【a prolonged drought 他因】 that has recently ended.
水位下降是因为刚刚结束的干旱--（他因削弱）
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