四川有丰富的天然气资源,以天然气为原料合成尿素的主要步骤如下图所示(图中某些转化

题型:填空题

问题:

四川有丰富的天然气资源,以天然气为原料合成尿素的主要步骤如下图所示(图中某些转化步骤及生成物未列出):

请填写下列空白:

(1)已知0.5 mol甲烷与0.5 mol水蒸气在t ℃、p kPa时,完全反应生成一氧

化碳和氢气(合成气),吸收了a kJ热量,该反应的热化学方程式是:______________________。

(2)在合成氨的实际生产过程中,常采取的措施之一是:将生成的氨从混合气体中及时分离出来,并将分离出氨后的氮气和氢气循环利用,同时补充氮气和氢气。请运用化学反应速率和化学平衡的观点说明采取该措施的理由:

________________________________________________________________。

(3)当甲烷合成氨气的转化率为75%时,以5.60×107 L甲烷为原料能够合成________L氨气。(假设体积均在标准状况下测定)

(4)已知尿素的结构简式为,请写出两种含有碳氧双键的尿素的同分异构体的结构简式:

①__________________;  ②_________________。

考点:能量的相互转化
题型:填空题

阅读短文,选择正确答案。

     One thing that British and Chinese cultures share is a love for fine tea. Today, when we think of Western

tea culture, we often think of the English and beautiful china tea cups.

     Afternoon tea 

     People believe that an English lady, Anna, first introduced the idea of afternoon tea. In the 18th and 19th

centuries, the English ate only two main meals each day breakfast and a heavy supper that would last for several

hours in the evening. As a result,people often got very hungry during the long wait between these two meals. To

solve this problem, Anna came up with the clever idea of inviting some friends to join her for an afternoon meal

between four and five o'clock. This meal included cakes and sandwiches and tea was served (提供) to wash

down the food. In order to make this afternoon meal important, fine china cups and plates, and silver teapots.

knives, forks and spoons were used Soon, afternoon tea parties became popular social occasions. Today,

afternoon tea parties continue to play an important part in the social life in modern Britain.

     Will you come for coffee?

     Coffee also has an important role in British culture. People often use the words "Will you come for coffee?"

to mean "Would you like to come to my home for a chat?" Normally, several different drinks such as tea, hot

chocolate or a soft drink like orange Juice will be served as well as coffee and you will be asked what you would

like. However, you will not normally he offered wine at a "coffee" party.

     Coffeehouses and the London Stock

     Exchange In the 17th century London, coffeehouses were busy and noisy places. Businessmen and bankers

went to coffeehouses to do their business, as well as to drink coffee. In fact, the London Stock Exchange

(股票交易所) is believed to have started from these coffeehouses.

1. Anna introduced the idea of drinking afternoon tee because she _______. [ ]

A. enjoyed chatting with her friends at home

B. loved fine tea and beautiful china tea cups

C. wanted to share nice food with her friends

D. found people felt hungry during the long wait between the two meals

2. What does "social occasions" mean in Chinese? [ ]

A. 集体婚礼

B. 社交活动

C. 社区表演

D. 公共场合

3. If someone says to you "Will you come for coffee?", you ________.[ ]

A. will be offered coffee only

B. are asked what you would like to drink

C. will be asked to have a chat with him or her

D. are invited to take part in an afternoon tea party

4. From the last paragraph (段落) we can see ________. [ ]

A. a new business was started in coffeehouses

B. coffeehouses are still used by businessmen end bankers

C. businessmen and bankers went to coffeehouses just for coffee

D. most people wouldn't like to go to coffeehouses because of the noise

5. Which is the best title (标题) of the article? [ ]

A. British And Chinese Cultures

B. The Beginning Of Tea And Coffee

C. Coffeehouses And Business

D. English Tea And Coffee Culture

题型:填空题

不属于历史文化资源表现形式的是()。

A.历史遗迹

B.历史建筑

C.无形文化遗产

D.古代园林

题型:填空题

阅读下列材料:

材料一:光绪帝命康有为、梁启超等人实施变法,并颁布了一系列变法法令。史称“戊戌变法”。

材料二:孙中山领导的辛亥革命爆发后,帝国主义感到他们在中国的特权受到了威胁。他们不愿意看见一个独立自主的新中国出现在世界上,决心扑灭这场革命……

材料三:一批进步的知识分子陈独秀、李大钊、胡适、鲁迅等,高举“民主”和“科学”两面大旗,掀起了一场新文化运动。

材料四:洋务派掀起了一场“师夷长技”的洋务运动。它没有使中国富强起来,但引进了西方先进的科学技术,使中国出现了第一批近代企业。

材料五:俄国十月革命的胜利,使中国知识分子看到了希望。李大钊先后写了《庶民的胜利》、《布尔什维克的胜利》,为俄国的胜利欢呼呐喊,并通过《我的马克思主义观》一文向国人系统地介绍了马克思主义,从此,马克思主义开始传遍中国,并最终促使了中 * * 党的诞生。

(1)请将材料中五项内容的数字代号按时间的先后顺序填入适当的空格处:材料_____→材料_____→材料_____→材料_____→材料_______

(2)为了中国的前途和命运,一些先进的中国人,在中国近代化的道路上进行了不懈地努力和探索。请在上述材料中任选一则,就其中的历史事件谈谈你的看法。

___________________________________________________________________________

题型:填空题

如图所示的交流电路中,理想变压器输入电压为,输入功率为,输出功率为,各交流电表均为理想电表.当滑动变阻器R的滑动头向下移动时(        )

A.灯L变亮

B.各个电表读数均变大

C.因为不变,所以不变

D.变大,且始终有

题型:填空题

因果图

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