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标题: 天山-7-Q26 (看不懂题意啊) [打印本页]

作者: freesimens 时间: 2005-7-12 06:58 标题: 天山-7-Q26 (看不懂题意啊)

Q26:

K is a set of integers such that if the integer "r" is in K, then "r+1" is also in K. Is 100 in K?

(1) 50 is in K. (2)150 is in K.

Answer is A: Statement (1) ALONE is sufficient, but statement (2) alone in not sufficient.

请问这题到底是什么意思,是说如果一整数r在数集K中,则r+1也一定在,问100这个数在不在数集K中?

请教解题思路,谢谢!

作者: freesimens 时间: 2005-7-13 07:04

恍然大悟！！！！

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