[求助]请问PP1-DS-168

slin0717

168. 16680-!-item-!-187;#058&010861
    

On the number line, the distance between x and y is greater than the distance between x and z. Does z lie between x and y on the number line?
    

(1) xyz < 0

(2) xy < 0

答案选(E)

 

 

请问各位像这种题型要怎么解比较快，我能想到的只有用数字代入计算

不过总是害怕会漏掉那一个条件，请各位指点一下

[此贴子已经被作者于2008-6-15 14:43:08编辑过]

windconniewj

我认为C正确，两个条件知道Z大于零，又因为XY<0, 条件又距离，所以Z在中间