下图所示为实验室用高锰酸钾制取氧气的装置。 (1)写出试管中所发生反应的化学方

题型:实验题

问题:

下图所示为实验室用高锰酸钾制取氧气的装置。

(1)写出试管中所发生反应的化学方程式___________________,图中收集氧气的方法是________。

(2)停止实验时,应先___________,然后再熄灭酒精灯。熄灭酒精灯的方法是_________________。

考点:氧气的制取和收集
题型:实验题

低压电力网中,电力装置的接地电阻不宜超过()欧。

A.4

B.0.5

C.10

题型:实验题

第二节(共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两处为多余选项。

If you are hungry, what do you do? Have your favorite meal and stay quiet after that? __76__ But it never lets you know, because you keep it busy thinking about your friends or favorite stars. So it silently serves your needs and never lets itself grow. When mind loses its freedom to grow, creativity(创造力) gets a full stop. This might be the reason why we all sometimes think “ What happens next?”, “Why can’t I think?”

__77__ Why reading but not watching TV? It is because reading has been the most educative tool used by us right from childhood. Since it develops other aspects of our life, we have to take help from reading.

Once you read a book, you run your eyes through the lines and your mind tries to explain something to you. __78__ Now this seed(果实) is unknowingly used by you to develop new ideas. If it is used many times, the same seed can give you great help to relate(联系) a lot of things, which you would have never thought of in your wildest dreams!

This is nothing but creativity. __79__ Within no time you can start talking with your friends in English or any other language and never run out of the right words.

So guys, do give food for your thoughts by reading, reading and more reading. __80__ Go and get a book!

A.The interesting part of the book is stored(存储) in your mind as a seed.

B.Why not do some reading while you are hungry?

C.Just like your stomach, your mind is also hungry.

D.Now what are you waiting for?E.Hunger of the mind can be actually solved through wide reading.

F.Reading can help you make more friends, too.

G.Also this makes a significant contribution to your vocabulary.

题型:实验题

污水三级处理所采用的方法有()

A.化学絮凝

B.过滤

C.生物膜

D.物理分离

题型:实验题

水平仪使用前必须对水平仪的零位进行()或调整。

A.校对

B.测试

C.设计

D.改造

题型:实验题

邮储个人网银柜面注册客户根据身份认证方式不同,可分为()。

A.UK+短信客户

B.电子令牌客户

C.手机短信客户

D.UK+电子令牌客户

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