问题 判断题

用于防止人为触电的漏电保护器,其动作电流不得大于30mA,动作时间不得大于0.1s。()

答案

参考答案:对

填空题

我会解释画线的词语,还知道句子的意思。

1.为是若与?曰:然也。

     其:____            弗:                   非:            

句意:                                                                                                                                 

                                                                                                                                            

2.我日始出时人近,而日中时远也。

     以:____             去:                   日中:               

句意:                                                                                                                                  

                                                                                                                                              

3.知多乎?

     孰:____              汝:               

句意:                                                                                                                                   

                                                                                                                                              

问答题 简答题