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标题: GWD1-16 [打印本页]

作者: xiaoyuexing    时间: 2010-1-15 07:28     标题: GWD1-16

Q16:

If J, S, and V are points on the number line, what is the distance between S and V?

(1)     The distance between J and S is 20.

(2)     The distance between J and V is 25.

                 

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

Answer: E

How to calculate? My answer is C

作者: initusur    时间: 2010-1-15 21:44

应该选E,
列式子 !J-s!= 20
         !J-V!=25
求 S-V , 则,不只一个解





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