A:25℃时,PH=13的1.0L Ba(OH)2溶液中含有的OH-数目为0.2NA
B:标准状况下,2.24L Cl2与过量稀NaOH溶液反应,转移的电子总数为0.2NA
C:室温下,21.0g乙烯和丁烯的混合气体中含有的碳原子数目为l.5NA
D:12g金刚石含共价键的个数是2 mol
在中国,“文化”一词,古已有之。《说文解字》称:“文,错画也,象交文。” , 。 。 , 。它本身既有政治内容,又有伦理意义。
①“化”本义为变易、生成、造化,其引申义则为改造、教化、培育等
②引申为包括语言文字在内的各种象征符号,以及文物典章、礼仪制度等等
③包含着一种正面的理想主义色彩,体现了治国方略中“阴”和“柔”的一面
④中国古代的这些“文化”概念,往往与“武力”、“武功”、“野蛮”相对应
⑤“文”的本义,系指各色交错的纹理,有文饰、文章之义
下列属于混合物的是( )
There is a new park near Andy's home. It's fine today. Andy and his family are in the park now. On their left, there is a café. On their right, there is a big lake. There are many flowers and trees around the lake. There's a small hill behind the lake. Near the lake, there are two signs. One says, “Don't swim in the lake!” The other says, “No fishing!” But you can go boating on the lake. There is a beautiful garden in the middle of the park. There are green grass and beautiful flowers in it. There are some small shops between the lake and the garden. The park is so beautiful. Andy and his family like it very much.
读《简·爱》,最终简·爱在什么情况下,与罗彻斯特结合在一起?