题目

下面四个几何体中，左视图是四边形的几何体共有（ ▲  ）       A. 1个                           B.2个                        C.3个                        D.4个  答案：B解析:略 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？___________________________________________________________________________________________（2）唐太宗对科举制的完善做出了哪些贡献？___________________________________________________________________________________________（3）科举制在我国历史上产生了什么样的积极影响？_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________（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？_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________