问题
填空题
导体对电流______的大小叫电阻．电阻是导体本身的一种______，不同导体电阻______．
答案
电阻是导体对电流的阻碍作用．导体的电阻是导体本身的一种属性，它的大小决定于导体的 材料、长度、温度及横截面积．不同的导体电阻一般不同．
故答案为：阻碍作用、属性、一般不同．
搜题请搜索小程序“爱下问搜题”
导体对电流______的大小叫电阻．电阻是导体本身的一种______，不同导体电阻______．
电阻是导体对电流的阻碍作用．导体的电阻是导体本身的一种属性，它的大小决定于导体的 材料、长度、温度及横截面积．不同的导体电阻一般不同．
故答案为：阻碍作用、属性、一般不同．
| 补全对话：根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 | |
| A: Where have you been, Fang Li? I called you, but you weren't in your office. B: 1_ A: What did you do there? B: I found out that the factory was pouring waste water into the river near it._ 2 . Lots of fish have died. A: 3 _ . B: Do you think "Greener China" can do something? A:_ 4_ . We can write a story about it to the TV station and the newspaper. B: 5_ . Businessmen are afraid of newspapers and TV stations. | |
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