问JJ上一个数学概念

reeve

,主要概念是 :一个非质数的正整数,一定是几个质数的积吗?.

 80. n is a positive integer, but not a prime number. Then n must be
D) the product of an even number and prime number
E) the product of prime numbers.
I chose B,有人说选E.疑问?

[此贴子已经被作者于2007-9-22 16:03:28编辑过]

心若琉璃

这题好像是一题PS题~~

和这题应该是同出一辙

 一个正整数大于1，但不是质数，问下列那个必对？

1）the sum of the 3(可能，既不太清了）

2) difference between the two even numeber

3) differenve between the even and odd number

4) the product between odd and even number

5) the product of the prime numbers

选b？2) difference between the two even numeber？？不对吧

masaka

楼主看错了 选项是D,E 不是1,2，当作DS做了。。。。

reeve

哦,这样啊,我说呢,原来是pS不是dS.还以为作错了呢

[此贴子已经被作者于2007-9-23 11:10:52编辑过]

superlin5540

以下是引用reeve在2007-9-23 10:03:00的发言：

哦,这样啊,我说呢,原来是DS不是PS.还以为作错了呢

LZ又错了吧,是PS,不是DS吧!