如图所示，直线A为电源的U-I图线，曲线B为灯泡电阻的U-I图线，用该电源和小灯泡组成闭合电路时，电源的输出功率和电路的总功率分别是()_刷题宝

题干

如图所示，直线A为电源的U-I图线，曲线B为灯泡电阻的U-I图线，用该电源和小灯泡组成闭合电路时，电源的输出功率和电路的总功率分别是( )

A：4W、8W

B：4W、6W

C：2W、4W

D：2W、3W

上一题下一题 0.0难度选择题更新时间:2019-07-16 11:44:33

答案(点此获取答案解析）

B

同类题1

The police have issued a detailed______of the missing boy．

同类题2

已知函数f（x）是定义在R上的周期为4的奇函数，当0＜x＜2时，f（x）=2^x，则 f（﹣

\frac{9}{2}

）+f（4）=____．

同类题3

药剂中常含有化学物质，下图是两种常见胃药的标签。下列说法正确的是（）

同类题4

判断下列句子是否与短文相符。

Hello, my name is Tom. I'm a pupil. I go to school from Monday(星期一) to Friday(星期五). I have six lessons a day. Four in the morning and two in the afternoon. From 11:20 a.m. to 1 p.m., I have a lunch break.Today is Tuesday(星期二). I have Chinese, Maths, Music and PE in the morning. And I have Science and Art in the afternoon. I like PE and Art. I likeplaying football in the playground. Art is fun. I like drawing. I can draw nice picture. My sister likes Art too. We join the art club together.

同类题5

认真观察分析如图所示装置，并填空．

小学学科试题库

初中学科试题库

高中学科试题库