问题 单项选择题

机车信号接收线圈的外壳上、下两部分间的绝缘电阻不小于()。

A.0.2MΩ

B.2MΩ

C.1MΩ

D.25MΩ

答案

参考答案:A

单项选择题
写句子

按要求改写下列句子。    

1.我原来想取笑大夫,没想到反让大夫取笑了。(改成“把”字句)  

                                                                                                                                               

2.朝鲜阿妈妮把志愿军伤员背进了防空洞。(改成“被”字句)  

                                                                                                                                               

3.山洪咆哮着,从山谷里狂奔而来,势不可挡。(改成比喻句)

                                                                                                                                               

4.木桥开始晃动,发出吱嘎嘎的声音。(改成拟人句)