(10内江14)下列物质属于纯净物的是 A.液化空气 B.石油 C.蒸馏水 D.

题型:选择题

问题:

(10内江14)下列物质属于纯净物的是

A.液化空气

B.石油

C.蒸馏水

D.碘酒

考点:单质和化合物纯净物和混合物氧化物同素异形体
题型:选择题

患者7岁,替牙牙合,磨牙关系Ⅰ类,上前牙唇倾,下前牙舌倾,覆牙合覆盖大 。

患者若有不良习惯应该 ()

A.观察

B.破除不良习惯,然后观察

C.矫正错牙合畸形,然后观察

D.错牙合矫正后破除不良习惯

E.破除不良习惯,然后矫正错牙合畸形

题型:选择题

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。选项中有两项为多余选项。

If you are hungry, what do you do? Have your favorite meal and stay quiet after that?  71  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 gets a full stop.This might be the reason why we all sometimes think "What happens next?", "Why can't I think?"

  72  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 get help from reading.

Once you read a book, you run your eyes through the lines and your mind tries to explain something to you.  73 Now this seed 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 a lot of things which you would have never thought of in your wildest dreams!

This is nothing but creativity.  74  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.  75 Go and get a book!

A.The interesting part of the book is stored 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:选择题

标准化的常用形式是标准化内容的存在方式,也是标准化过程的表现形态。关于各种标准化形态的目的,说法正确的有( )。

A.注意遵守适时和适度原则是统一化的目的

B.对社会产品类型有意识自我控制和调节的有效方式是简化的目的

C.最大限度扩大同一产品的使用范围,最大限度地减少产品在设计和制造过程中的重复劳动是通用化的目的

D.通用化是标准化的高级形式,是标准化走向成熟的标志

E.将产品的主要参数、型式、尺寸等做出合理安排与规划,以协调系列产品和配套产品之间的关系是产品系列化的目的

题型:选择题

产后宫颈完全恢复至未孕形态所需要的时间是()。

A.1周

B.2周

C.3周

D.4周

E.5周

题型:选择题

旅客在乘车途中客票有效期终了,要求继续乘车时如何处理?

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