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meishiba 发表于 2013-10-11 16:30
请楼主帮忙看看是不是这篇作文题目
Our total sales have increased this year by 20 percent since we ad ...
artetanolan 发表于 2013-10-11 17:45
第一题的n不能够是7吧,a(1)a(2) a(3)a(4) a(5) a(6)……a(28)的product含有5的6次方,所以N最多是6 ...
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