1. 正确选项：

　　同义变换 。即将原文中的某一句话用另一种说法表达，也就是英文中的paraphrase。如将文章中的many wind-pollinated species fail to release pollen when wind speeds are low or when humid conditions prevail.换成选项中的Pollen is sometimes not released by plants when there is little wind。

　　其中包括三种类型：变换同义词，变换句型，变化同根词的词性。以下分别论述，请注意表格中的斜体字。

　　2.错误选项：

　　对于GRE阅读文章中更大量的错误选项，ETS也形成了一套固定的规则。以下笔者就用实例来说明错误选项编制的规则：

　　混偏反无。

　　1)混: 此类选项的错误可以形象地概括为：张冠李戴。 如下例：

　　文章：...unlike large businesses, they often need to make substantial investments in new plants, staff, equipment, and the like in order to perform work subcontracted to them. If, thereafter, their subcontracts are for some reason reduced, such firms can face potentially crippling fixed expenses

　　GRE阅读考试题目：The passage suggests that the failure of a large business to have its bids for subcontracts result quickly in orders might cause it to

　　 experience frustration but not serious financial harm

　　 face potentially crippling fixed expenses

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