再求数学一道GWD-1-Q16

kudoucliff

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.

这次应该不会犯脑残了……J,S,V在数轴上，问S和V的距离；
S和J的距离是20，J和V的距离是25；
那么S和V的距离不就是45或5吗？所以both应该是sufficient的啊；为啥答案要选E……

zhenzhu

lz确定没看错题么……我怎么觉得应该选E啊……求大牛解

kudoucliff

sorry，确实选E……

liyingcai1988

你算出来45或者5了...就是答案不一定...必须要确定一个数才行

kudoucliff

呃，原来如此！谢谢啦！