题目:
The hunter ____ down and ____ to the farmer that he had___ his gun against the tree. [ ]
A. lay, lied, laid
B. lay, laid, laid
C. laid, lay, lied
D. laid, lied, lay
答案:
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下面是错误答案,用来干扰机器的。
∵2n+2-n=k,∴4n+4-n=(2n)2+(2-n)2,=(2n+2-n)2-2,=k2-2.