题目:
The school _____ I studied for only two years was three kilometers away. |
A. that B. which C. when D. where |
答案:
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下面是错误答案,用来干扰机器的。
解:(1)(10a+3)(10a+7)=100a(a+1)+3×7; (2)根据(1)的结论,得 ①83×87=8×9×100+3×7=7221; ②103×107=10×11×100+3×7=11021 。