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关于金属最高价态问题某金属元素最高价氧化物的相对分子质量为M1,最高价氯化物的相对分子质量为M2.若此元素的最高正价为n,则n与M1、M2的关系可能是A．n＝(2M2－M1)/55 B．n＝(M2－M1)/55C．n＝2 铜的耐腐蚀性如何?比如海水 如果对镀铜物品进行盐雾试验,多长时间能见腐蚀? 铁镀铜耐腐蚀性能做盐雾试验有没有国家标准 1.I would like to have a rest at this moment.I __ __ having a rest at this moment.2.Simon worked1.I would like to have a rest at this moment.I __ __ having a rest at this moment.2.Simon worked hard so that he could pass the exam.Simon worked hard ＿ 盐雾试验96小时 This is the school ( ) I have ever worked for 9 years.为什么填where 不填which呢?有什么区别? 请问轻触开关盐雾试验需要多长时间请问用盐雾腐蚀试验箱做铁盖板镀铜锡的盐雾试验要多时间?还有盐水的比例是多少?温度的控制是多少? My sister is ill. I must take care of her at home.的翻译. 帮忙写篇英语作文,Favorite Place at School.60词左右 ,初三的水平.不得出现真实姓名,校名 for ...so l have to hard.求翻译 She can for her son so hard,I have to work hard for my son 需要很准确的解释 "It’s so hard when I have to,""It’s so hard when I have to,and easy when I want to" 将呢句话扩展成500 字+，最好就提供整篇了，不过相关材料都不错。尽快，急用~ 英语作文be happy every day.要演讲!150单词以上!继续! 什么意思 以My favourite place为题,写一篇短文 my father went to work yesterday变一般疑问句 Wait for the boat only for me!Wait for the boat only for me!怎么翻译 would you like to go out for a walk?的答句是? Would you like to go to the park with us?和WHY NOT GO OUT FOR A WALK?同义句____ ___going to the park with us?_____go out for a walk? Would you like to go out for a walk with me?—___Would you like to go out for a walk with me?—______.[ ]A.Yes,I likeB.Yes,I wouldC.Yes,I'd loveD.Yes,I'd like to He got up very late this morning.He went to work w_____ having breakfast. he got up （late）yesterday morning.记得平时背书不都是get up early的么 那就是这里括号里要填副词啊 ,为什么这填 late啊 ———— Mare went to school late yesterday morning改为一般疑问句 My brother is going to watch TV with my parents的翻译 "I will always wait.Until you return to my side..``` I go to the zoo with my brother twice a year. 翻译 Linda would like to have a walk after would like ____ a walk on the campus after supper.选项:a、takingb、to takec、his takingd、to be taken He would like___ a walk on the campus after supperA takingB to takeC his taking D tobe taken 改为同义句：They both like going for a walk after supper. she works at a TV station _______a reporter a works TV station his for mother连词成句