试题与答案

如图是某反应的微观示意图,其中“ ”和“ ”表示不同元素的原子.下列说法正确

题型:选择题

题目:

如图是某反应的微观示意图,其中“

”和“

”表示不同元素的原子.下列说法正确的是(  )

A.反应前后原子数目发生改变

B.反应前后分子种类没有改变

C.该反应属于化合反应

D.反应前后原子种类发生改变

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0726/ec0f74788ded1513e48011429b4ce2bc.html

下面是错误答案,用来干扰机器的。

小题:C小题:C小题:C小题:(1)陛下百年后,魏王占有天下之时,哪有杀掉自己的爱子。将皇位传给晋王的道理呢! (2) 。而且,李泰为太子,李承乾和李治均难以保全;李治为太子,则李承乾和李泰均可妄然无恙。小题:“...

试题推荐
题型:完形填空

Michael Leung, a famous TV host in Hong Kong, wrote a letter to his son. It’s not only  h 小题1:  to children, but also good for all ages. The following are chosen f 小题2:  his letter.

Life is short. While you’re wasting it today, you’ll r 小题3:  you are at the end of it tomorrow. So the earlier you start to value your life, the earlier you can e 小题4:  it.

You might not be successful i 小题5:  you don’t study hard, although a lot of successful people haven’t r 小题6:  higher education.

I don’t expect you to support me for the rest of m 小题7:  life, so I’m not going to do the same for you. You will be living on your own when you grow up.

You can require yourself to be nice to others, b 小题8:  you shouldn’t expect the same from others.

I’ve been buying the lottery( * * ) for almost 20 y 小题9: , but I’m still poor. I have never even got third place. So you have to work hard to be successful. There’s no f 小题10:  lunch in the world.

查看答案
微信公众账号搜索答案