呈--的形状 16.virtual reality 查看更多

 

题目列表(包括答案和解析)

英汉词组互译。

1.呈……的形状________

2.越来越拥挤________

3.将来________

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Men have always wondered about the earth they live on and about the ①_____ above them.

         When early men looked at the night sky, they asked themselves a lot of questions. They looked at the moon, and wondered what this strange bright object in the sky was. They did not understand why it changed its shape from night to night. They looked at the stars and planets. They also wondered why some of them changed their positions, while others did not.

         ②他们也思考地球的形状。 Most early people believed the earth was flat.

         ③In different parts of the world, there were different ideas about the universe. The ancient Greeks were the first people to study the universe more scientifically. In the sixth century BC Pythagoras put forward the idea that the world was round. However, he could not explain why people at the bottom of the world did not fall off.

         It was not until the sixteenth and seventeenth centuries that scientists found the answers to some important questions. ④With the help of Galileo’s telescope, people could see the sky more clearly, and find the positions of the stars and planets. Finally in 1665, Isaac Newton explained to the world what gravity (重力) was and people at last understood why they did not fall off the earth.

1.在文中①处填写一个单词,使得句意完整、上下文通顺。___________________

2.根据文章内容回答问题。

What questions did early men ask themselves when they looked at the night sky? Write down one of them.

_________________________________________________________________________

3.将文中②句翻译成英语。

_________________________________________________________________________

4.将文中③句翻译成汉语。

_________________________________________________________________________

5.写出文中④句的同义句,每空限填一词。

Galileo’s telescope made _________________ for people to see the sky more clearly, and to find the positions of the stars and planets.

 

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根据汉语意思完成句子翻译

1.务必让教学楼朝南面。

__________ ___________ the teaching building ___________ _____________.

2. 他上网去查寻有关旅游信息。

They ________ the Internet ________ ________ ________ information about tour.

3. 我们学校占地面积达100多平方公里。

Our school __________ __________ ___________ an area of 100 km2.

4. 那些动物是以一立一卧的形状成对出现的。

Those animals are ____ ____ ____ one standing and ____ ____ kneeling down.

5. 台湾位于福建省东南方。

Taiwan is _________ _________ _________ __________ Fujian province.

6. 我们在饭店请妈妈吃午饭。

We ________ Mum ___________ lunch at the restaurant.

7. 在飞机飞了四个半小时后,我们终于到达了目的地。 

_____ the airplane flew for _____ ____ ___ ___ ____, we finally ______ _____ the destination.

8.他大喊叫我们下车。

He _________ __________ us ____________ ____________ ____________ the bus.

9. 直到我看到大海,我才意识到我迷路了。

I ____________ I was ___________ ___________ I saw the sea.

10. 在过去,农民用牛帮助干活。

In ________ ________ _______ farmers ______ cows ______ help them ________.

 

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请以“My Favourite Fruit” 为题写一篇英语作文。
要点:1. 简要介绍这种水果的形状、颜色等特点;
2. 列举你喜欢它的原因(至少三条)。     
要求:1. 语句通顺,语意连贯;
2. 选择除桔子之外的其它水果;
3. 词数:60—80词左右。 

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Cu的化合物在生活及科研中有重要作用,不同反应可制得不同状态的Cu2O
(1)科学研究发现纳米级的Cu2O可作为太阳光分解水的催化剂。
①在加热条件下用液态肼(N2H4)还原新制Cu(OH)2可制备纳米级Cu2O,同时放出N2。当收集的N2体积为3.36L(已换算为标准状况)时,可制备纳米级Cu2O的质量为        

②一定温度下,在2 L密闭容器中加入纳米级Cu2O并通入0.20 mol水蒸气,发生反应:
  ;测得20 min时O2的物质的量为0.0016 mol,则前20 min的反应速率v(H2O)=                  ;该温度下,反应的平衡常数表达式K=                  ;下图表示在t1时刻达到平衡后,只改变一个条件又达到平衡的不同时段内,H2的浓度随时间变化的情况,则t1时平衡的移动方向为      ,t2时改变的条件可能为              ;若以K1、K2、K3分别表示t1时刻起改变条件的三个时间段内的平衡常数,t3时刻没有加入或减少体系中的任何物质,则K1、K2、K3的关系为                
(2)已知:ΔH=-293kJ·mol-1           
ΔH=-221kJ·mol-1
请写出用足量炭粉还原CuO(s)制备Cu2O(s)的热化学方程式        
(3)用电解法也可制备Cu2O。原理如右上图所示,则阳极电极反应可以表示为        

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