应对GMAT数学中的数据充分性讲解
<p> 1. <span word="GMAT">GMAT</span>数据充分性问题的说明相当复杂。做真题的时候，在着手解题之前，花些时间冷静的学习一下数据充分性问题的说明，是很有必要的。熟读、理解整个说明，熟记下面这五个选项，这五个选项对于每一道数据充分性问题都是一样的。考试时，千万不要再花时间看说明了。</p><p> <span word="A">A</span>. <span word="Statement">Statement</span> <span word="ALONE">ALONE</span> <span word="is">is</span> <span word="sufficient">sufficient</span>, <span word="but">but</span> <span word="statement">statement</span> <span word="alone">alone</span> <span word="is">is</span> <span word="not">not</span> <span word="sufficient">sufficient</span> <span word="to">to</span> <span word="answer">answer</span> <span word="the">the</span> <span word="question">question</span> <span word="asked">asked</span>;</p><p> <span word="B">B</span>. <span word="Statement">Statement</span> <span word="ALONE">ALONE</span> <span word="is">is</span> <span word="sufficient">sufficient</span>, <span word="but">but</span> <span word="statement">statement</span> <span word="alone">alone</span> <span word="is">is</span> <span word="not">not</span> <span word="sufficient">sufficient</span> <span word="to">to</span> <span word="answer">answer</span> <span word="the">the</span> <span word="question">question</span> <span word="asked">asked</span>;</p><p> <span word="C">C</span>. <span word="BOTH">BOTH</span> <span word="statements">statements</span> <span word="and">and</span> <span word="TOGETHER">TOGETHER</span> <span word="are">are</span> <span word="sufficient">sufficient</span> <span word="to">to</span> <span word="answer">answer</span> <span word="the">the</span> <span word="question">question</span> <span word="asked">asked</span>, <span word="but">but</span> <span word="NEITHER">NEITHER</span> <span word="statement">statement</span> <span word="ALONE">ALONE</span> <span word="is">is</span> <span word="sufficient">sufficient</span>;</p><p> <span word="D">D</span>. <span word="EACH">EACH</span> <span word="statement">statement</span> <span word="ALONE">ALONE</span> <span word="is">is</span> <span word="sufficient">sufficient</span> <span word="to">to</span> <span word="answer">answer</span> <span word="the">the</span> <span word="question">question</span> <span word="asked">asked</span>;</p><p> <span word="E">E</span>. <span word="Statements">Statements</span> <span word="and">and</span> <span word="TOGETHER">TOGETHER</span> <span word="are">are</span> <span word="NOT">NOT</span> <span word="sufficient">sufficient</span> <span word="to">to</span> <span word="answer">answer</span> <span word="the">the</span> <span word="question">question</span> <span word="asked">asked</span>, <span word="and">and</span> <span word="additional">additional</span> <span word="dataspecific">dataspecific</span> <span word="to">to</span> <span word="the">the</span> <span word="problem">problem</span> <span word="are">are</span> <span word="needed">needed</span>.</p><p> 2. 搞清楚，你的目标是判定是否有足够的信息来回答问题。不要花时间进行任何运算。<span word="GMAT">GMAT</span>数据充分性问题主要是考查数学概念，而不是数字运算的能力。如果你发现自己在进行大量的笔头运算，那你一定走错了方向。</p><p> 3. 和标准多项选择题中的几何图形不同的是，数据充分性问题的图形并不一定成比例除非说明了图形是按比例作出的。不要目测角度大小、线段长度和面积。要利用数学知识处理题干给出的数字，来解决问题。</p>
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