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题库 / Prep2007E1-DS-95
Is ~$\frac{1}{a-b}$~ < b - a ?
(1) a < b.
(2) 1 < ~$\left | a-b \right |$~.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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（1）可以判断，（2）说明a-b>1,或者a-b<-1;第一种情况可以判断原式必定不成立，第二种情况可以判断原式必成立，但（2)有这两种情况，所以还是不能判断，选A
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