论文部分内容阅读
世界空天飞机技术向美国挑战
【出 处】
：
低速气动力
【发表日期】
：
1991年1期
其他文献
分析了微小孔镀金的难点,对比了微小孔分别在常压和负压下化学镀金的深镀能力。结果表明,在常压下微小盲孔化学镀金的深镀能力不如电镀金。在负压下对微小盲孔化学镀金后,孔
开发了酸性无氰镀镉新工艺NCC-617。镀液组成为：氯化镉35-40 g/L,配位剂120-160 g/L,氯化钾140-180 g/L,光亮剂1.5-2.5 m L/L,辅助剂25-35 m L/L,p H 6.0-7.0。工艺条件为：挂镀
This huge volume of approximately 7.5 million words synthesizes the results ofancient and modern scholarship, while avoiding these predecessors’ shortcomings,
自古以来,儒家士大夫有丰富而深刻的经济思考,只是未以专门学科形态呈现。十九世纪末以来,伴随着西方之力量优势,西方经济学传入中国,并主导经济学思考、经济制度设计和政策
surveys the evolution of the contract system of 'responsibility linked to production' in the cooperative economy of China’s socialist agricultural sect
analyzes Mao Dun’s fiction in terms of its intellectual and artistic characteristics. The author divides Mao Dun’s fiction into three periods according to the
霾污染的形成和扩散,与以高增长为主题的经济发展方式正相关。治理霾污染的根本之法是改变经济发展方式,这需要经济学的引导。为此,经济学应遵循生境法则,使之成为引导经济活
maintains that all the victories achieved by the Chinese people in thedemocratic revolution, socialist transformation and socialist construction aregreat victor
holds that the Yan-Li thinkers of the early Qing Dynasty opposed the Neo-Confucian orthodoxy of the period.They repudiated Neo-Confucian thinking and advocated