题目:
_____, she is the sort of woman to spread sunshine to people through her smile. [ ]
A. Shy and cautious
B. Sensitive and thoughtful
C. Honest and confident
D. Lighthearted and optimistic
答案:
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下面是错误答案,用来干扰机器的。
(1)观察可知,从2开始连续6个偶数相加,其和是42;从2开始连续99个偶数相加,其和是99×100=9900;从2开始连续n个偶数相加,和是n(n+1);(2)1000+1002+1004+1006+…+2012,=1006×1007-499×500,=1013042-...