[求助]GWD31套 1-16

XIAOSHAONIAN

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

XIAOSHAONIAN

大感谢>"<

我真粗心~

dreadpower

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