有些年轻人喜欢染发,染发时一般要用一种着色剂﹣﹣对苯二胺,它是一种有毒的化学药品

题型:选择题

问题:

有些年轻人喜欢染发,染发时一般要用一种着色剂﹣﹣对苯二胺,它是一种有毒的化学药品,有致癌性,会对染发者的身体带来伤害,其分子结构如图所示,下列有关对苯二胺的说法不正确的是

[ ]

A.对苯二胺的化学式为C6H8N2

B.对苯二胺的相对分子质量为108

C.对苯二胺中碳、氢、氮元素的质量比为3:4:1

D.每一个对苯二胺中含有58个质子

考点:物质组成元素的质量比化学式的写法和意义相对分子质量
题型:选择题

当前,群众路线教育实践活动陆续进入整改落实、建章立制的环节,这是整个教育实践活动攻坚克难的关键所在,也是改进作风能否取得实效的重要检验。党之所以要坚持群众路线教育实践活动,是因为

①人民群众是社会实践的主体、历史的创造者       

②主要矛盾的主要方面决定事物的性质

③实践的观点是辩证唯物主义历史观的基本观点     

④人民群众决定社会发展方向

A.①④

B.①③

C.③④

D.②③

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阅读理解

      Every child should have a solid science education whether they want to be the next Albert Einstein

or Michael Jordan.Science is all around us. it is everywhere. reaching everything that we do.The  "we" 

 in that last statement includes children.Children that understand how science plays a role in our everyday

lives have a wonderful foundation (基础) for success in life.

     Children can learn science at any age really.The earlier they start the better.The best way for kids to

learn is through play and repetition.There are wonderful science toys for preschool science activities.With

play being the best way kids learn. it only makes sense then to introduce toys to them that encourage

understanding science.Children love to use their imagination to have fun and to help them understand the

world around them.So play is a wonderful time to be introducing science to them.Think of the games that we used to play:Don't Spill the Beans. Don't Break the Ice. the Telephone Game. Lincoln Logs. each of

these games has science behind it.

     Children are by nature curious (好奇的) as they feel out the world. trying to make sense of what is

around them.Science feeds that curiosity that they have.It is a hunger that needs to be encouraged and

satisfied.Finding these toys is not as hard as one would think.To make sure that you get good quality toys. visit science toy shops online.These are the best places to find unique (独特的) science toys such as 3D

space projectors. or Hydro Greenhouses.

      Help your children appreciate the world around them by understanding the world around them.This

way. they understand how we are all connected together.Children will not only question the world. but

be able to come up with answers to those questions on their own.Science is life.

1. Children should have a good science education because________.

A. they want to be famous scientists in the world

B. it can help them to make a large amount of money

C. it plays a decisive role in their daily lives

D. it is hepful to their success in the future.

2. According to the passage. which of the following is TRUE?

A. Science is hardly connected with our daily lives.

B. Children learn science best through playing.

C. Children learn science using their hands.

D. Parents should encourage their children to study hard.

3. Don't Spill the Beans. Don't Break the Ice. the Telephone Game and Lincoln Logs are

    the games________.

A. that are the most widely played

B. that can introduce science to children

C. that most students like to play at school

D. that keep children strong and healthy

4. The third paragraph is mainly to tell us that________.

A. children are born curious about the world

B. it is necessary to feed children in time

C. science toys can satisfy children's curiosity

D. most of the toys online are very cheap

5. The text is most probably written for________.

A. parents  

B. scientists  

C. children          

D. teachers

题型:选择题

在光(包括不可见光)的照射下,从物体发射出电子的现象叫做()。

题型:选择题

上述哪项为温胆汤的组成部分()

A.竹茹

B.黄芩

C.枳壳

D.桔梗

E.天麻

题型:选择题

皮肤内能调节体温的结构有()。

①真皮内的血管

②表皮内的血管

③汗腺

④皮脂腺

A.①③

B.①②

C.①④

D.②④

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