If x, y, and z are three integers, are they consecutive integers?
(1) z - x = 2
(2) x < y < z
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
题目分析:
本题判断x、y、z是否为连续整数。
(1) 根据条件1,无法得知y的数值,不能判断x、y、z是否连续。
(2) 根据条件2,只有x、y、z的大小关系,也不能确定x、y、z是否连续。
结合条件1和条件2,由条件1得到z=x+2,又由于x < y < z,所以,满足条件的y只能为x+1,此时,x,y,z为连续的整数。
因此,本题答案为(C),两个条件结合起来才能解题,任何单独一个均不行。
If x, y, and z are three integers,意思就是不考虑xyz出现重复的情况