问题 多项选择题

水锤产生原因是()。

A.水流速突然为0

B.出水闸门突然大开

C.运行的水泵突然停电

D.供电电压突然下降8%

答案

参考答案:A, B, C

填空题
探究题

       近代化主要是指资本主义产生、发展和资产阶级民主政治制度确立的过程。19世纪末到20世纪初,中国近代化在饱受列强欺凌、被迫开放的环境中起步。   

(1)中国主要经历了哪些重要的变革?   

                                                                                                                                                            

(2)这些变革体现了什么样的思想主张?  

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

(3)这些思想对中国近代化的起步分别产生了什么积极作用?  

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

(4)从这些思想主张的发展变化,可看出近代化的起步有什么特点?