一只断灯丝的灯泡，摇接灯丝后使用，要比原来亮一些，这是因为灯丝的_刷题宝

题干

一只断灯丝的灯泡，摇接灯丝后使用，要比原来亮一些，这是因为灯丝的　

A：电阻变小

B：电阻增大

C：电阻率减小

D：电阻率增大

上一题下一题 0.0难度选择题更新时间:2017-11-21 04:57:21

答案(点此获取答案解析）

A

同类题1

选择合适的句子补全对话。

A. Yes,I did. B. We went there by bus.

C. How about you? D. I played baseball with John.

E. What did you do yesterday?

Amy:Hi, Tom ____

Tom:I picked apples on my uncle's farm. ____

Amy:____ How did you go to the farm?

Tom:____

Amy:Did you have a good time?

Tom:____

Amy:Me too.

同类题2

已知 $y = f (x)$ 是可导函数，“ $f' (x_{0}) = 0$ ”是“ $x_{0}$ 为函数 $f (x)$ 极值点”的( )

同类题3

一How's it going ?

一．

同类题4

两架飞机，东西相距一万千米，同时从赤道起飞，以同样的速度、同样的高度一直向北飞行，其结果是（）

同类题5

I’ve had such a fun time, reading Harry Potter with my friend, __________we are both sad that it has come to an end.

小学学科试题库

初中学科试题库

高中学科试题库