汽油是由多种碳氢化合物组成的混合物,取11.4g样品,在氧气中充分燃烧,经分析测定产生16.2gH2

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/06 19:34:49
汽油是由多种碳氢化合物组成的混合物,取11.4g样品,在氧气中充分燃烧,经分析测定产生16.2gH2
apple id怎么弄 habit的用法 南极会有极光吗? 在南极能看到极光么?我看新闻报道上说 在北极能看到极光 那在南极也能看到么? first aid training什么意思 accustomed 和habit有什么区别和用法是习惯的意思吗 way的用法He always does things his own way.这个句子里的way是做句子的什么成分?我总觉的这个句子不对,说”以...方式”时不是应该用in a...way吗,为什么这个句子里没有IN if i were you,i'd have a first-aid book on a nearby shelf in your home为什么用your 1.if you _______more about giving first aid,you______us had known,could have helped2.Never _____such an animal as Jim described after his coming back from the New Zealand.have i heard 还是 did i hear,还是had i heard问:1中had known是根据could If you love first,it can continue If you love first,it can continue? I love her sweet smile and attractive. 初三英语:first-aid什么词性?必须要是准确答案!谢谢! first-aid是算一个单词还是算一个词组? 在中国古代历史上,从第一次大一统的终结到第二次大一统的开始期间大约相距多少年 I thought the movie would be good for my English,but _____ it turned out,it was an Italian movie.A when B as 选什么,为什么不选另一个,两者的区别是什么, you have s____ my book.you have to pay for it. finger is crossing是什么意思? 英语翻译来自一篇文章:body language上下文:the difference between Arab and Japanese crowding is great.Arab like to touch their companions;to deny a friends's breath is to fell ashamed.The Japanese,in their closeness,preserve a formalit 我想问一下"Keep you hair across."同"Keep you finger across."后一句算不算一句彦语?有咩典故?前一句有没其它意思呢?呢两句究竟分别是咩意思? She always helps the old ___ (cross) the road.快点!谢谢! She____the road when she reached the secon1d___(cross). 隋朝统一全国用了多久 I really want to say everything ,but I could not have the courage, How to find a successful reason for failure early less excuse Don't find excuse for failure and try to find a solution for success.急, deep freeze 6 standard must be disabled before any Install/Uninstall can proceed 英语翻译Perhaps your relationship would be much better if you spend less time trying to convince yourself that you are being authentic and more time demonstrating authenticity to your partner.The truth of who you are must be lived not just believ 把Her ruler is red变成否定句和一般疑问句并2种作回答 You can do it,trust yourself.You will pass the exam.That's all To who take part in exam of tomorrow Come on 这里有没的语法错误? 冯茹萍翻译英文名不要同音! This week,most children are looking f_____to the chinese new year. If you (not be)careful next time ,you'll not pass the exam.