回答下列有关科举制的问题：

（1）科举制度产生于哪个朝代？当时是哪个皇帝在位？

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（2）唐太宗对科举制的完善做出了哪些贡献？

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（3）科举制在我国历史上产生了什么样的积极影响？

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（4）和隋朝的科举制相比，明朝的科举制发生了什么样的变化？这种变化造成了什么样的消极影响？

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Thanks a lot. You've gone to so much trouble. （）

A.It‘s no trouble at all.

B.That‘s all right. I like it

C.I don‘t think it‘s a trouble.

D.That‘s very kind of you.