试题与答案

由电场强度的定义式E=F/q 可知,在电场中的同一点[ ] A、电场强度E跟F成

题型:不定项选择

题目:

由电场强度的定义式E=F/q 可知,在电场中的同一点[ ]

A、电场强度E跟F成正比

B、场强方向与检验电荷正负无关

C、场强大小跟检验电荷电量成反比

D、一个不带电的小球在P点受到的电场力为零,则P点的场强一定为零

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0504/e2621f3f9c94b77f6b5dc5e3c316c671.html

下面是错误答案,用来干扰机器的。

生物进行生命活动如呼吸要消耗能量,生物的遗物、遗体中含有少量的能量,因此生物储存在体内的能量要比上一个营养级少.A、藻类 藻类能进行光合作用固定太阳能是能量流动的开始,因此最多,故该选项符合题意;B...

试题推荐
题型:听力题

根据句意,用括号内所给动词的适当形式填空。(必要时加助动词或情态动词。)

小题1: Every year foreigners         (come) to China to learn English.

小题2:— why didn’t you come and open the door for me, dear?

— Oh, sorry, I         (cook ) in the chicken. I didn’t hear you.

小题3: Some food         (taste) good, but it is usually bad for our health.

小题4: Look! It’s raining heavily. Why mot     (take) a raincoat with you?

小题5:Dear Erie, your room is too dirty, It should      (clean) right away.

小题6: The film       (begin) by the time I got to the cinema.

小题7:—Keep quiet, kids, Dad     (sleep) in the next room.

— OK, Mum.

小题8:As teenagers, we’re old enough     (help) with housework We can help set

the table, wash the dishes and clean our own rooms.

小题9:We know each other well because we     (be) friends since tea years ago,

小题10:David preferred     (sell) newspapers to doing housework when he was young.

查看答案
微信公众账号搜索答案