【单选题】宋朝科学家沈括的《梦溪笔谈》记载了毕昇发明的泥活字印刷,本书是用( )印刷术印刷而成。
【简答题】Situated in the South West of England, between Exeter and Plymouth, Torquay is one of the most popular holiday resorts in Britain. It provides a variety of entertainment, sports of every kind and cult...
【简答题】D Life has changed in Mexico City.Streets normally filled with people are empty.One of the most popular professional soccer teams recently played a in an empty stadium that can seat more than100,...
【单选题】下列选项中史实与结论之间逻辑关系正确的是( ) 史实 结论 A 郭守敬主持测定了黄道和赤道的交角值 元代科技成就全面领先世界 B 东汉蔡伦改进了造纸术,制成 “ 蔡侯纸 ” 是书写材料的巨大进步 C 宋代毕昇发明了活字印刷术 活字印刷完全取代了雕版印刷 D 明清通俗文学蓬勃发展 明清时期市民阶层兴起
【简答题】阅读理解。 Most British telephone cards are just plain green, but card collecting is becoming a popular hobby in Britain and collectors even have their own magazine, International Telephone Cards. One reas...
【简答题】我国的线装书最早出现在 ( ) 代,而同时代的发明家( )发明了活字印刷术,从而大大促进了当时我国出版业的发展。
【单选题】在毕升发明的泥活字传入欧洲400年以后,德国人约翰内斯·谷登堡发明了铅活字印刷术,开始使用铅合金浇铸活字排印书籍。谷登堡对印刷术的发明创新发明推动了()
【单选题】已知一对正确安装的标准渐开线圆柱齿轮传动,其压力角ɑ= 20 o ,模数m=4mm,传动比i12=3,中心距a=144mm。则两齿轮的分度圆直径分别为
【单选题】The black color is _______ this year. [ ]