问题 填空题

在AgNO3、Cu(NO32、Mg(NO32的混合溶液中加入一定量的铁粉,充分反应后过滤,向滤液中滴加稀盐酸,有白色沉淀生成,则滤纸上的物质是______,滤液中的溶质是______.

答案

根据金属活动性由强到弱的顺序为镁>铁>铜>银,向溶液中加入一定量的铁粉,铁不能与硝酸镁反应,故滤渣中一定不含有镁,根据向滤液中滴入稀盐酸,有白色沉淀产生,则滤溶液中仍含有硝酸银,混合溶液中硝酸银未完全反应,可得到所加入铁粉量不足;铁只与硝酸银发生反应且铁粉量不足,反应生成银和硝酸亚铁;因此,所得滤渣中只含有银;溶液中有硝酸镁、硝酸亚铁、硝酸铜和硝酸银.

故答为:Ag,Fe(NO32、AgNO3、Cu(NO32、Mg(NO32

阅读理解

阅读理解。

     Kong Zi, also called Confucius (551-479 B.C), and Socrates (469-399 B. C) lived only a hundred years

apart, and during their lifetimes there was no contact between China and Greece, but it is interesting to look

at how the world that each of these great philosophers came from shaped their ideas, and how these ideas

in turn,shaped their societies.

     Neither philosopher lived in times of peace, though there were more wars un Greece than in China. The

Chinese states were very large and feudal, while the Greek city-states were small and urban. The urban

environment in which Socrates lived allowed him to be more radical than Confucius. Unlike Confucius,

Socrates was not asked by rules how to govern effectively. Thus, Socrates was able to be more idealistic,

focusing on issues like freedom, and knowledge for its own sake. Confucius, on the other hand, advised

those in government service, and many of his students went out to government service.

     Confucius suggested the Golden Rule as a principle for the conduct of life:"Do not do to others what you

would not want others to do to you." He assumed that all men were equal at birth, though some bad more

potential than others, and that it was knowledge that set men apart. Socrates focused on the individual, and

thought that the greatest purpose of man was to seek wisdom. He believed that the superior class should rule

the inferior (下层的) classes.

     For Socrates, the family was of no importance, and the community of little concern. For Confucius,

however, the family was the centre of the society, with family relations considered much more important

than political relations. Both men are respected much more today than they were in their lifetimes.

1. Which of the following is TURE according to the first paragraph?

A. Socrates and Confucius had much in common.

B. Confucius had much influence on Socrates' ideas.

C. The societies ware influenced by the philosophers' ideas.

D. There were cultural exchanges between China and Greece.

2. Socrates shared with Confucius the idea that _____.

A. all men were equal when they were born

B. the lower classed should be ruled by the upper class

C. the purpose of man was to seek freedom and wisdom

D. people should not ask others to do what they did not want to

3. What made some people different from others according to Confucius?

A. Family.

B. Potential.

C. Knowledge.

D. Community.

4. This passage is organized in the pattern of _____.

A. time and events

B. comparison and contrast

C. cause and effect

D. definition and classification

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