问题 单项选择题

()实质上是往复式行驶线路的变形。

A、复合环形式线路

B、简单环形式线路

C、汇集式直线形线路

D、汇集式环形线路

答案

参考答案:C

问答题

如何评价秦始皇(或汉武帝、曹操、孝文帝等等)?

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

填空题