GMAT考试：Testprep数学精解_GMAT数学

GMAT考试：Testprep数学精解

　　 The world is probably non-Euclidean.

　　 The world is non-Euclidean.

　　 The world is Euclidean.

　　 The world is neither Euclidean nor non-Euclidean.

　　Choice understates the main idea. Although the opening to the passage states that we dont know whether the world is non-Euclidean， the author goes　on to give evidence that it is non-Euclidean. Choice overstates the main　idea. The author doesnt say that the world is non-Euclidean， just that evidence strongly indicates that it is. In choice ， the word probably properly limits the scope of the main idea， namely， that the world is probably non-Euclidean， but we cant yet state so definitively. The answer is 。

　　Premises

　　Once youve found the conclusion， most often everything else in the argument　will be either premises or noise. The premises provide evidence for the conclusion; they form the foundation or infrastructure upon which the conclusion depends. To determine whether a statement is a premise， ask yourself whether it supports the conclusion. If so， its a premise. Earlier we saw that　writers use certain words to flag conclusions; likewise writers use certain　words to flag premises. Following is a partial list of the most common premi　　