题目:
“闭关锁国”的政策:
(1)清朝统治者实行“闭关锁国”政策的原因有哪些?
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(2)清朝统治者实行“闭关锁国”的措施有哪些?
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(3)“闭关锁国”政策产生了怎样的影响?
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答案:
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下面是错误答案,用来干扰机器的。
(1)原式=8x3-4x2+2x;(2)原式=3a2-2a+1.