问题 填空题

在制备AgI胶体过程中,若KI过量,则胶核优先吸附()而带负电荷。整个胶团结构可以表示为()

答案

参考答案:I-;[(AgI)m·nI-·(n-x)K+]x-·xK+

单项选择题 B型题
阅读理解

Beijing today, first published in May, 2001, is the capital’s only English weekly newspaper and is published with the help of the Information Office of the Beijing Municipal Government and run by Beijing Youth Daily. Its readers include English-speaking foreigners living in Beijing and local Chinese who have great interest in English or take English as a working language.

The paper’s main content deals with metropolitan life, explaining the differences and similarities between Eastern and Western culture. Its culture and lifestyle part is regarded as a guide to metropolitan life in Beijing.

The paper has 24 pages in four main sections:

NEWS: Select stories that discuss cultural differences.

COMMUNITY: Reports on developments related to foreigners in the city and a platform(平台)by which they can communicate with a bigger audience.

CULTURE and LIFESTYLE: Highlights from international lifestyle and fashion trends in Beijing

STUDY: Cheerful and humorous pieces to help English-language students improve their skills

Beijing Today circulates 50,000 copies published every Friday. It is one of Beijing’s most authoritative(权威的) English media sources, and is sold at post newsstands and distributed in hotels, apartment complexes, etc.

Price: 2 yuan per issue

小题1:Which of the following sections would be the best choice to exchange thoughts with others?

A.NEWS

B.COMMUNITY

C.CULTURE and LIFESYLE

D.STUDY小题2:If you want to subscribe to Beijing Today for half a year, you need to pay ________.

A.52 yuan

B.24 yuan

C.104 yuan

D.48 yuan小题3:What CANNOT you read in Beijing Today?

A.News abou foreign cultural festivals

B.fashion trends in Paris.

C.Discussions with foreigners

D.Skills in improving English