关于点电荷，下列表述正确的是（）_刷题宝

题干

关于点电荷，下列表述正确的是（）

A：任何带电体都能看作点电荷

B：点电荷是实际带电体的理想化模型

C：只有带电量很小的带电体才能看作点电荷

D：只有质量很小的带电体才能看作点电荷

上一题下一题 0.0难度选择题更新时间:2017-09-08 04:01:24

答案(点此获取答案解析）

B

同类题1

“他反对任何形式的暴力，他的身体虽然是柔弱的，但他的学说和精神感召力却比100艘英国军

舰更有力量。”材料中的“他”应当是指

同类题2

I like eating ____( 蔬菜 ).

同类题3

Several months later, he found his deskmate very difficult _______.

同类题4

2013年10月18日下午，兰花湖校区图书馆三楼学术报告厅座无虚席，来自中国科学院大气物理所的研究员高登义为同学们做了一场主题为“东非大裂谷与雅鲁藏布大峡谷”的精彩讲座．东非大裂谷位于（）

同类题5

阅读下面对话，在空白处填入恰当的内容。

A: So, what's your plan for this weekend?

B: I just want to stay at home.

A: How about going to____ ?

B: Sorry, I've been tired these days. I just want to have a good rest.

A: But I think going to movies is a better way to____ yourself.

B: You are probably right.

A: Maybe we should go out to ____ first.

B: Yeah, I think so.

A: I know pizza's been your favourite. Let's meet at Sam's Pizza House. I heard they just came

out with a new pizza.

B: Really? I haven't been there for a long time. When shall we meet?

A: Well, the movie is at 2:00 pm and 1:00 pm.

B: ____ go to the 2:00 pm show?

A: No problem. We can meet at Sam’s Pizza House at 11:00 am.

B: Perfect. If so, we can have plenty of time to____ .

小学学科试题库

初中学科试题库

高中学科试题库