A:标准状况下,22.4L H2O含有的分子数为NA
B:1 mo1·L-1 NaCl溶液中所含有的Na+离子数目为NA
C:标准状况下,22.4L氯气中所含原子数为NA
D:一定条件下,46克钠与足量的H2O完全反应,转移电子数为2NA
I get up at 6:30 in the morning. Then I wash my face and brush my teeth. I go to school at 7:00. I go to school by bike. Classes begin at 7:30. We have six lessons every day. We have three lessons in the morning and three in the afternoon. Classes are over at 5:00. I get home at 5:15. We have dinner at 6:00. I go to bed at 9:00.
“目贵明,耳贵聪,心贵智,以天下之目视,则无不见也;以天下之耳听,则无不闻也;以天下之心虑,则无不知也。”(春秋《管子•九守》)。这对我国治国理政的启示是( )
①增强治国理政的本领必须扎根于人民群众创造性实践之中
②社会主义协商民主是我党群众路线在政治领域的重要体现
③要切实推进协商民主更广泛多层次制度化发展
④人民政协是社会主义协商民主的重要渠道
圆x2+y2+2y=1的半径为( )