B. D.

英

美

网络密度

“ The Capital Gazatte ”, first published in the Han Dynasty ( 206 B. C.-220 A. D.), was the earliest newspaper in the world.
创始于中国汉代的《邸报》是世界上最早的报纸。
During the Han Dynasty ( 206 B. C.-220 A. D.), the centralized feudal state became even more powerful by inheriting the Qin system.
汉朝（公元前206年&公元220年）继承秦制，中央集权的封建国家更加强大。
Virus ( RSV) Pneumonia in infants. Methods The 48 cases of RSV pneumonia were randomly divided into 4 groups, A. B. C and D.
研究方法婴幼儿呼吸道合胞病毒（RSV）肺炎48例，随机分为A、B、C、D4组，每组12例。
R. B. D. palm oil appraisal of hygiene exploration
精炼食用棕榈油卫生评价探讨
To obtain every spacial diffusion parameter of earthquake damage elements, an information system of historical seismic disasters ( 2300 B. C. to A. D. 1980) has been set up.
为了获得震害要素的空间扩散参数，建立了大型的中国历史地震灾情信息系统（2300B.C.～A.D.1990）。
Clinical Analyses of Acute Non-A. B. C. D. E Viral Hepatitis
急性非甲乙丙丁戊型病毒性肝炎的临床分析
The research technical line is: a. Analysis for Social-economic statistical information system; b. System design; c. Spatio-temporal database design; d. System development.
研究的技术路线为：①社会经济统计信息系统的分析；②系统的设计；③时空数据库设计；④系统的实现。