几个导体串联起来，相当于增大了导体的______，所以总电阻比任何_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

几个导体串联起来，相当于增大了导体的______，所以总电阻比任何一个导体的电阻都______．几个导体并联起来，相当于增大了导体的______，所以总电阻比其中任何一个导体的电阻都______．

答案

导体的电阻取决于导体的长度、材料和横截面积，同种材料的导体越长、横截面积越小，导体的电阻越大．

（1）几个导体串联起来，相当于增加了导体的长度，总电阻要增大，并且比任何一个电阻都大；

（2）几个导体并联起来，相当于增加了导体的横截面积，总电阻要变小，并且比任何一个电阻都小．

故答案为：长度，大，横截面积，小．

改错题

短文改错。

下面短文中有10处语言错误，请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号（^），并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11 处起）不计分。

He asked her to go and meet him outside the theatre. Mike's wife is very glad because they hadn't seen a film

for quite long time. She met her husband at the entrance to a cinema. Mike took out his wallet to get the ticket,

so they were not there. He then tried his pockets, but the tickets were not there, too. Mike looked very worrying."What's the matter?" asked his wife."Well," Mike explained,"I remember that I did with them. I put them on

the desk and forgot to pick them up before leaving for the office!"

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单项选择题

科学决策、民主决策、（）是做好政府各项工作的前提。

A、依法处置

B、依法监督

C、依法决策

D、依法行政