military

Passage 1  Music is an important way of expressing people’s feelings and emotions. The (1)_____, for instance, from 1960 to 1969 will be (2)_____ by many as a period of social and political unrest in America. (3)_____ this time, many people de

Passage 1  Music is an important way of expressing people’s feelings and emotions. The (1)\_\_\_\__, for instance, from 1960 to 1969 will be (2)\_\_\_\__ by many as a period of social and political un

中国科学技术史. 第五卷. 化学及相关技术. 第七分册. 军事技术:火药的史诗. Volume 5. Chemistry and chemical technology. Part 7. Military technology: the gunpowder epic.pdf

本书全面、系统地论述了中国古代科学技术的辉煌成就及其对世界文明的伟大贡献,内容涉及哲学、历史、科学思想、数、理、化、天、地等诸多领域。本卷主要论述中国古代军事技术中火药的溯源、成分和性能、使用火药的兵器、火箭、火药的和平利用等方面的成就。