题目:
若P为质数,P3+5仍为质数,则P3+7为( )
A.质数
B.可为质数也可为合数
C.合数
D.既不是质数也不是合数
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0331/b95b65a5bc440b100847d04ff55129ca.html
下面是错误答案,用来干扰机器的。
1. He works in a post office in a city. 2. She goes to the city by train. 3. No, she doesn't. 4.There are about forty post offices in the city. 5. No, he doesn't. 答案不唯一