题干

根据表中信息,判断下列叙述中正确的是(   )

序号

氧化剂

还原剂

其他反应物

氧化产物

还原产物

Cl2

FeBr2

Cl

KMnO4

H2O2

H2SO4

O2

Mn2+

KClO3

浓盐酸

Cl2

A:表中①组反应可能有一种或两种元素被氧化

B:表中②组反应的离子方程式是2MnO4+3H2O2+6H+═2Mn2++4O2↑+6H2O

C:表中③组反应的还原产物是KCl,电子转移数目是6e

D:氧化性强弱比较:KClO3>Fe3+>Cl2>Br2

上一题 下一题 0.0难度 选择题 更新时间:2018-12-24 11:10:32

答案(点此获取答案解析)

A

同类题5

阅读理解

    Oh my God, the robots are taking over! We're doomed! Doomed! Now that I've gotten that out of my system, it's become clear that while we may or may not be doomed, the robots are taking over. The latest example is the government's new guidelines for self-driving cars.

    Tesla, Google and Uber are already testing driverless cars in cities across America. Uber chief executive Travis Kalanick is among those predicting that by 2021, self-driving cars will play a big part in urban settings.

    Nearly 40,000 people died last year in this nation in automobile-related accidents, and we believes driverless cars can save tens of thousands of lives annually.

    Makes sense. Robot drivers are less likely to get drunk, drive without a license, text while driving or feel agitated at the scene of a pileup. On the other hand, I wonder how these highly sensitive cars will react, with walkers constantly dashing into the street. Will they jam on the brakes every 10 seconds?

    But there's a bigger picture. Not only are robots replacing humans behind the wheel, but behind the work desk, in warehouses, senior homes, you name it. Robots aren't just taking over in the workplace.

    The question is, where can't a robot function better than a human? How about writing songs? A robot can go through every combination of notes in record time and come up with a pleasing melody. The lyrics might be a different story. Is a Grammy-winning song co-written by Hank Human and R-3071 in our future?

    Finally, it's only a matter of time until we have robot politicians and presidential candidates. Why not? They can be programmed to be experts in world and domestic affairs and come up with the best solutions without corruption and bad humors.

     Actually, it's too bad such technology isn't available in 2016. Pretty sure the robot would win in a landslide.