草酸的分子式为()A.H2C2O2•1H2O B.H2C4O2•2H2O C.H2C 发布时间:2017-06-28 01:15 │ 来源:www.tikuol.com 题型:单项选择题 问题: 草酸的分子式为()A.H2C2O2•1H2OB.H2C4O2•2H2OC.H2C2O4•2H2OD.H2C2O2•2H2O
题型:单项选择题 一British engineer,Tim Berners-Lee_______the idea of the World Wide Web in 1989.一You’re right,and the World Wide Web is 25 years old this year.A.caught up with B.got along with C.came up with 查看答案
题型:单项选择题 原北京市委书记陈希同、全国人大副委员长成克杰、江西省副省长胡长清被绳之以法,充分体现了①法律面前人人平等 ②依法治国的方略③违法必究的原则 ④人民当家作主的权利A.①②③B.①②④C.①③④D.②③④ 查看答案