A:1mol甲基(-CH3)中含有的电子数目为10NA
B:25℃,pH=13的NaOH溶液中含有OH-的数目为0.1NA
C:标准状况下,2.24L已烷含有分子的数目为0.1NA
D:46gNO2和N2O4混合气体中含有原子总数为3NA
读“地球经纬示意图”,完成下列各题。
关于塑料的下列说法中,不正确的是( )
“(北魏孝文帝)初谋南迁,恐众心恋旧,乃示为大举,因以协定群情。外名南伐,其实迁也。旧人怀土,多所不愿,内惮南征,无敢言者,于是定都洛阳”这段材料说明的问题不包括
下列各句加线词的活用现象进行分类,正确的一项是( )①君为我呼入,吾得兄事之 ②项伯杀人,臣活之 ③范增数目项王 ④常以身翼蔽沛公⑤晋军函陵 ⑥若亡郑而有益于君 ⑦发尽上指冠 ⑧顷之未发,太子迟之
阅读下面的文章,根据所给的中文正确拼写单词,使文章意思完整。一空一词 I have been in Australia for two weeks. I'm____ (过) a good time here, although I have to be ____ (诚实) and say that I ____ (更喜欢) China. I'm lucky to be here for my one- year English ____ (课程). It’s a great challenge for me. I will try my best to ____ (处理) with each of them. I used to spend too much time ____ (闲谈) with others on the Internet. Now I have ____ (意识到) I must take the chance. And I mustn't____ (浪费) time or money. Australia is the____ (六) largest country in the world and Sydney is a beautiful city, but I have no interest to go sightseeing. I'm ____ (自信) of myself I can catch up with others. I will memorize the experience in Australia.