不同元素的原子(包括离子) ( )_刷题宝

题干

不同元素的原子(包括离子) ( )

A：质子数一定不等

B：中子数一定不等

C：质量数一定不等

D：核外电子数一定不等

上一题下一题 0.0难度选择题更新时间:2019-04-14 06:45:39

答案(点此获取答案解析）

A

同类题1

A. At last，we watched the dolphin show(海豚表演).

B. Sure，I'd love to!

C. I went to the Sea World with my parents.

D. Where did you go?

E. Can I speak to Bill，please?

F. By the way，why did you call me?

Jack：Hello! This is Jack. ____

Bill：This is Bill speaking.

Jack：Hi，Bill! I called you yesterday，but nobody answered the phone.

Bill：____

Jack：How cool! Did you have a good time?

Bill：Yes! We saw whales，seals，sharks…____That was interesting!

Jack：That sounds good.

Bill：____

Jack：Oh，tomorrow is my birthday. There will be a birthday party in my house. Would you like to come?

Bill：____See you tomorrow!

Jack：See you!

同类题2

“丝绸之路”是联系中外的纽带，沟通东方和西方的桥梁，为它的开辟做出了突出贡献的历史人物是( )

同类题3

在“测定小灯泡的电功率”的实验中，已知小灯泡的额定电压为3.8V．如图1是小严同学连接的实物电路．

同类题4

如图所示，两个线圈套在同一个铁芯上，线圈的绕向在图中已经表示。线圈连着平行导轨M和N，导轨电阻不计，在导轨垂直方向上放着金属棒ab，金属棒处于垂直纸面向外的匀强磁场中，下列说法中正确的是( )

同类题5

.
Any application form _____ properly will not be accepted by the company.

小学学科试题库

初中学科试题库

高中学科试题库