在下面一段文字横线处补写恰当的语句,使整段文字语意完整连贯,内容贴切,逻辑严密。每处不超过15个字。
①____。时而平缓,时而陡峭,有时驻足观望,有时边走边想;时而舒缓,时而峻急,有时沉思默想,有时豁然开朗,这是登山与品书的节奏和乐趣。 ②____:童谣里纯真的生活气息,诗词里万事万物的生动情感,武侠作品想象力的拓展,言情小说里的柔肠百结,科普读物的启人心智,历史演义的波澜壮阔……洋洋大观,充塞于目,不绝于耳,仿佛与先贤哲人对话,越数千年时空交流。世上没有登不尽的山,③____。
①单位时间内生成n mol O2的同时生成2n mol NO2
②单位时间内生成n mol O2的同时生成2n mol NO
③用NO2、NO、O2的物质的量浓度变化表示的反应速率的比为2:2:1的状态
④混合气体的颜色不再改变的状态
⑤混合气体的密度不再改变的状态
⑥混合气体的压强不再改变的状态
⑦混合气体的平均相对分子质量不再改变的状态.
My School Day in London Tim Hunt is telling 1 Chinese classmates about his school day in London. My school day in London is different 2 my school day here in China. School starts 3 nine o'clock. I get up at 7:00 4weekdays. I go to school 5 underground(地铁). It 6 about forty–five minutes. I have 7 at school. Classes are over at 3:15. It is early, 8 I stay at school and play games 9 my friends. I am 10 the basketball team. We practice(联系)on Monday 11 Wednesday. We have a match 12 Friday afternoon. On Saturday 13 I get up late. Then I 14 my parents tidy(弄整洁)the house and the garden. In the evening I often go to film or a club(俱乐部).On Sunday I have a good rest and of course, I do 15.