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
答案选E 可是我觉得是C,联立的话不是能求出来S-V是5么?
谢谢回答
V的两个不同位置决定有可能是5 或45 两种情况
V-----J---S J-------S--V
大感谢>"<
我真粗心~
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/) | Powered by Discuz! 7.2 |