问题 单项选择题

车辆换算闸瓦压力时,普通货车(轴重23t)在空车位,制动主管压力600kPa,使用铸铁闸瓦每辆换算闸瓦压力为()。

A、100kN

B、120kN

C、140kN

D、150kN

答案

参考答案:D

开放性试题

初一学习生活很快就结束了,你也一定遇到过困难、挫折,请你告诉老师:

① 学习方面主要遇到哪些困难、挫折:

                                                                                                                                                              

你采取的应对办法: 

                                                                                                                                                             

结果:

                                                                                                                                                             

② 交往方面的困难、挫折:

                                                                                                                                                              

你采取的应对办法: 

                                                                                                                                                             

结果:

                                                                                                                                                              

判断题