GRE数学常见出题原则归纳
<p> <span word="GRE">GRE</span>数学出题也讲究一定的原则，那么<span word="GRE">GRE</span>数学出题原则有哪些?在<span word="GRE">GRE</span>数学考试中，一般都假定以下信息为真：</p><p> <span word="All">All</span> <span word="numbers">numbers</span> <span word="used">used</span> <span word="are">are</span> <span word="real">real</span> <span word="numbers">numbers</span>;</p><p> <span word="All">All</span> <span word="figures">figures</span> <span word="lie">lie</span> <span word="on">on</span> <span word="a">a</span> <span word="plane">plane</span> <span word="unless">unless</span> <span word="otherwise">otherwise</span> <span word="indicated">indicated</span>;</p><p> <span word="All">All</span> <span word="angle">angle</span> <span word="measures">measures</span> <span word="are">are</span> <span word="positive">positive</span>;</p><p> <span word="All">All</span> <span word="lines">lines</span> <span word="shown">shown</span> <span word="as">as</span> <span word="straight">straight</span> <span word="are">are</span> <span word="straight">straight</span>. <span word="On">On</span> <span word="the">the</span> <span word="computer">computer</span>-<span word="based">based</span> <span word="test">test</span>， <span word="lines">lines</span> <span word="that">that</span> <span word="appearjagged">appearjagged</span> <span word="can">can</span> <span word="also">also</span> <span word="be">be</span> <span word="assumed">assumed</span> <span word="to">to</span> <span word="be">be</span> <span word="straight">straight</span> ：</p><p> <span word="Figures">Figures</span> <span word="are">are</span> <span word="intended">intended</span> <span word="to">to</span> <span word="provide">provide</span> <span word="useful">useful</span> <span word="information">information</span> <span word="for">for</span> <span word="answering">answering</span> <span word="the">the</span> <span word="questions">questions</span>. <span word="However">However</span>，<span word="except">except</span> <span word="where">where</span> <span word="a">a</span> <span word="figure">figure</span> <span word="is">is</span> <span word="accompanied">accompanied</span> <span word="by">by</span> <span word="aNote">aNote</span> <span word="stating">stating</span> <span word="that">that</span> <span word="the">the</span> <span word="figure">figure</span> <span word="is">is</span> <span word="drawn">drawn</span> <span word="tO">tO</span> <span word="scale">scale</span>， <span word="solve">solve</span> <span word="the">the</span> <span word="problem">problem</span> <span word="using">using</span> <span word="your">your</span> <span word="knowledge">knowledge</span> <span word="of">of</span> <span word="mathematics">mathematics</span>， <span word="not">not</span> <span word="by">by</span> <span word="visual">visual</span> <span word="measurement">measurement</span> <span word="or">or</span> <span word="estimation">estimation</span>.</p><p> 细心的读者会发现，上述假设实际上就是<span word="ETS">ETS</span> 出题原则，即：</p><p> 所有的数都是实数;</p><p> 除非题目中专门指出假设所有图形都在同一个平面内;</p><p> 所有的角的测量值都是正数;</p><p> 所有显示为直线的线均可当作直线来处理;</p><p> 伴随问题的图形将为解题提供有用的信息。但是，只有在问题中指出本图形是按比例画出时，才可以用目测或估计而得到的信息去解题。否则，只能运用你的数学知识去回答问题。这一解题原则可以简称为只能读图，不能度量的原则。</p>
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