在探究物质的熔化规律时,小刚选择了冰和蜡做为研究对象进行实验,其具体的实验记录如

题型:实验题

问题:

在探究物质的熔化规律时,小刚选择了冰和蜡做为研究对象进行实验,其具体的实验记录如下表所示,请根据实验记录回答下列问题:  

加热时间/ 01234567
冰的温度/℃-4-2000123
状态固态固态固、液固、液固、液液态液态液态
蜡的温度/℃3540455054586164
状态固态固态固态粘稠变稀液态液态液态
(1)在冰和蜡这两种研究对象中,属于晶体的物质是__________;

(2)本实验中晶体物质的熔点是________℃

考点:凝固现象熔化现象
题型:实验题

阅读理解。

     Carl has a clothes shop.The shop is open from 8: 00 a.m. to 6 : 30  p.m. Today Carl has a new 

idea. He wants to change the work time. He wants his shop assistants to come at 8: 00 a.m. and leave 

at 6:00 p.m. He asks his three shop assistants what they think of the idea.

      Eric: I don't think it's good. I usually go to bed at 12: 00 at night and get up at 8: 00. 

      Betty: I usually get up at 5: 30 a.m. and I don't mind it. If we can leave at 6: 00 p.m., 

I can join the chess club.

      Joe: I think it's terrible. I have no time to eat breakfast. 

1. Carl is ______ of the clothes shop.

A. the boss 

B. a king 

C. a shop assistant 

D. a work

2. Who thinks it is OK to go to work at eight?

A. Eric.      

B. Betty.

C. Joe

D. A and C.

 3. Eric usually gets up at ______ in the morning.

A. 5: 30

B. 6: 00

C. 8: 00

D. 8: 30

4. Joe thinks it's ______ to get to work at 8 : 00 a.m.

A. terrible

B. nice

C. exciting

D. funny

5. We can guess ______.     

A. lots of people visit the clothes shop every day     

B. Betty wants to join the chess club     

C. the three shop assistants all like the idea     

D. the boss doesn't like the idea

题型:实验题

在下列反应中,假设Cu与HNO3恰好反应

3Cu+8HNO33Cu(NO3)2+2NO↑+4H2O,若有6 mol e发生转移,则

(1)被氧化的Cu的物质的量为    mol。

(2)被还原的HNO3的物质的量为    mol。

(3)未被还原的硝酸的分子个数为    个。

(4)生成    mol NO。

(5)参加反应的硝酸的物质的量为    mol。

题型:实验题

确定施工项目成本核算对象的原则,应以每一独立施工图预算所列的()为依据,并结合施工现场条件和施工管理要求,因地制宜地确定成本核算对象。

A、单位工程 

B、分部工程 

C、分项工程 

D、主体工程

题型:实验题

阅读理解。

To all of you at Chinese love links,

     I am 44 years old and never married. I have always wanted to find that perfect someone that I dream

about. For about the last five years I have almost given up the hope of ever finding the one I truly wish to

spend the rest of my life with.

     I have always tried to be a nice guy. I had found your website some four or five months before. I did

not know what to expect. I don't know how to speak Chinese and never thought truly of how I was to an

Asian woman.

     Well, I had a lot of replies from some very nice and pretty women. I had a hard time finding only a couple

to write to. But one stood out from the rest. She was cute, nice and seemed to hold a lot of the same values

as I do. In a short time I had decided to write only to her. We communicated via emails 2-3 times a day and

phone calls once or twice a week.

     I went and met her and her family only a week ago. Her name is Ying and she lives in Nanning. I found

Nanning to be one of the most beautiful cities I had ever been to. We had even decided to marry and to bring

her to the USA under the fiancée visa. Not only did she meet everything I had ever hoped to find in someone

else but turned out to be what every woman should be like, at least the ones I have met. We plan to marry as

soon as she is here and start a family together as neither of us has children but we both want them.

     So to anyone out there reading this, I can only say this: You may not find what you are looking for if

you're not honest with your partner and yourself. This site worked for me mostly because I was honest with

something that I wanted in someone else. When I did find her, love can work even across the other side of

the world, between language differences and cultural differences. I wish you all luck in finding your perfect

match. I have finally found mine and wish to give all my thanks to those at Chinese love links to help make it

happen.

                                                                                                                                    Sincerely yours,

                                                                                                                                    Arthur

1. We can infer from the letter that Chinese love links is a website to _____.

A. help foreigners to travel in China

B. help both Chinese and foreigners to find one they want to marry

C. help Chinese and foreigners make friends

D. receive letters from the USA

2. Which of the following is true about Arthur's story?

A. He was sure of finding a Chinese woman as his wife at first.

B. He was determined to find a Chinese woman as his wife.

C. He almost lost hope in finding a perfect wife until he found Ying.

D. No women wrote to him before Ying.

3. Ying stood out from the rest because _____.

A. she was a Chinese

B. she had much in common with Arthur

C. other women stopped writing to Arthur

D. she was cute and nice and often phoned to Arthur

4. Arthur thinks _____ is the most important in finding someone one wants to marry.

A. being honest with the partner and oneself

B. help from the website

C. difference in languages and places

D. difference in cultures

题型:实验题

在研究水的升温特性过程中,小芳在烧杯中注入0.2kg的水.用酒精灯给烧杯加热,在水温由20℃上升至100℃的过程中.水的内能增加了______J,水吸收的热量______(选填“大于”、“小于”或“等于”)酒精燃烧所放出的热量[水的比热容c=4.2×103J/(kg•℃)].

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