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在一定温度下,1 mol金属铜与足量某浓度的硝酸完全反应,生成NO2和NO的物质的量之比为1:3,则反应过程中转移的电子总数为为什么是2mol,我算半死得出4mol.无语了.感激不尽! 1、将10g表面已被氧化成Na2O的钠块投入90.3g水中,充分反应后,得12g/cm3的溶液,同时放出3.36L气体（标况）,求所得溶液的物质的量浓度.2、某Na2CO3和NaHCO3固体混合物与2mol/L的盐酸200mL恰好完全反应. 急需话题是宽容的优秀文章,总字数约1000字,边上附上赏析, 语文摘抄如何分类150字左右 记住是150字左右 “as……as”与“so……as”有什么区别? as.as 和 so.as的区别是什么?英语问题·· HOW TO STUDY MATH WELL?我的数学很烂,怎么提高?做很多很多题?望有志之士帮小弟一把 how to use one year to learn the things well including math and ENGLISH.COS i want to study abroad.well ,i was graduated from Junior in June.but unforetunately,i didn't get a well result in the final test,i think it's not actually suit me wiyh my tru {初二英语}关于进行时表将来（be going to do)如上.只能用be going to do表将来么?能用be doing么?请您看这道题My brother is (going hiking) for vacation.（对括号内部分提问）____ your brother ____ for vacation?答案 be 的进行时可以是being吗?I don't ever want to talk about being a woman scientist again.我能看懂意思是说：我再不想谈论作为一个女性科学家这里的being我想应该不是做名词用,如何理解这个词的用法? be going to 是进行时还是将来时 children get a lot of love( )their parents 括号里填什么 American children don't often a____ for pocket money from their parents.完形填空,a开头的 Some of their hobbies may get _______(妨碍) of schoolwork Many yeenagers have hobbies ,but some hobbies might get ____of school work.A .in the way B.on the way C.by the way D.to the way请解释各个选项的意思 .match the following to make new words,and then translatethe new wordo into Chinese.1.pencil a.mill _______ _______2.arm b.cream _______ _______3.wind c.fiower ________ _______4.oil d.chair ________ _______5.ball e.box ________ _______6.sun f.master Mr.taylor,can you tell me how to learn english well sure.but remember nothing can be learned __hard wark.a by b at c without d for If you work harder at math,it won't be diffcult to learn的同义句是____ _____ you work at math ,_____ ______ it will be to learn. I yearn for nothing but work还是I yearn nothing but for work It is Sund ay_______.David and his_______are having a party at_____.短文填空,后面还有 Tony and his friends are having a party______Saturday afternoon.谁帮我填填啊…… Having a birthdag party in a resaurant and having it at home which one is better? 根据句意及首字母提示补全单词,使句子完整、通顺.the good news makes me f---- very happy He asked me to lend him some money,which I agreed to do,_that he paid me back the following weekHe asked me to lend him some money,which I agreed to do,on condition that he paid me back the following week这里的which I agreed to do,意思是不是 Try to translate the following sentences translate the following sentences.1我们必须更加努力.( put forth)2.2跟你没关系.管好你自己的事情.(nothing with)3.3彼得的建议对我们不起作用.(work)4.4我对面试有点担心(kind of)1.全世界的科学家正在致力于 被动语态to be与beingbeing 正在进行,to be将来要做 1.they insisted on the design being finished tomorrow.a.being finished b.to be finished为什么B是错的?2.The children went there to watch the iron tower__a.being ecrected b be erected 根据首字母完成单词,使句意完整通顺.⒈Elephants are the biggest animals on l_______.⒉Many animals in the zoo like to s______ at night.⒊The old man walked along the street s________. some of my classmates want to work as________ as possible.a.soon b.fast c.quickly说说原因 He knows everyone in school should obey the （）big success the film was .（what/how） Since then he played in more than twenty films.这句话哪错了