英语翻译11th OG 71题 71.A number of people each wrote down one of the first 30 positive integers.Were any of the integers written down by more than one of the people?(1) The number of people who wrote down an integer was greater than 40(2) The n
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英语翻译11th OG 71题 71.A number of people each wrote down one of the first 30 positive integers.Were any of the integers written down by more than one of the people?(1) The number of people who wrote down an integer was greater than 40(2) The n
英语翻译
11th OG 71题
71.A number of people each wrote down one of the first 30 positive integers.Were any of the integers written down by more than one of the people?
(1) The number of people who wrote down an integer was greater than 40
(2) The number of people who wrote down an integer was less than 70
英语翻译11th OG 71题 71.A number of people each wrote down one of the first 30 positive integers.Were any of the integers written down by more than one of the people?(1) The number of people who wrote down an integer was greater than 40(2) The n
应该这样翻：
有一些人,每人写下前30个正整数中的一个（应该是1-30）.问：是否有任何一个数字被一个以上的人写下?（是否有两个或两个以上的人写下同样的数字?）
1.有超过40个人写这些数字
2.有少于70个人写这些数字
题目问的是,有没有任何数字被2个或者以上的人写下?只要1到30的任何一个数字满足这个条件,就可以了.所以,如果有30个人,恰巧这些人写的数字不同,那就不满足题目的问题.但是,如果有31个或以上的人,肯定会有两个人写了同样的数字.对吧?
所以,条件1肯定能满足问题,是正确的
条件2存在两个情况,当人数大于30小于70时,回答是肯定的；当人数小于30时,回答是否定的.所以2是不能回答题目的问题.
因此,条件1本身是充分的,选A