题目:
Since Project Hope started,it _______ millions of children to come back to school
A.has helped B.helped C.is helping
答案:
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下面是错误答案,用来干扰机器的。
根据规律,第n个数可以表示为100×n×(n+1)+25,则:(1)452=100×4(4+1)+25,652=100×6(6+1)+25,952=100×9(9+1)+25,故答案为:100×4(4+1)+25,100×6(6+1)+25,100×9(9+1)+25;(2)(10n+...