问题 单项选择题

将C1(10μF/15V)和C2(20μF/25V)串联后,其最大安全工作电压为()。

A.15V

B.25V

C.22.5V

D.40V

答案

参考答案:C

材料分析题

阅读漫画“今天我值日”,回答问题。

(1)漫画说明了什么?这对青少年的成长有什么危害?

                                                                                                                                                                

                                                                                                                                                               

                                                                                                                                                               

(2)作为中学生的你,今后打算怎么做?

                                                                                                                                                               

                                                                                                                                                               

单项选择题