高中必修一化学方程式

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• 高中英语（有分）改错,只有一个是对的.You know how pleased it is to receive a letter from a 1.____ friend of yours,and how much eagerly you open and 2.____ read it.Reading friendly letters are always an enjoyable 3.____ thing.As a matter of a fact,it is a way to visit those 4.____ friends and places which we usually can not talk with 5.____ and see them every day.When writing a letter,think 6.____ about the person to whom you are writing.What would 7.____ he like to kno
• 高中英语单选一道It was about 600 years ago _______ the first clock with a face and an hour hand was made.A.thatB.untilC.beforeD.when老师上课讲是强调句,用that.但是我觉得填when的话,也可以啊……在此请教,望讲明白一些...一楼大哥,别光填一个选项啊,..
• 一个很难的高中英语单选题----高手帮忙In my opinion, life in the twenty-first century is much easier than _____ .A：that used to be B：it is used to C：it was used to D：it used to be答案是D,但是我看不懂D项,it是代指life的对吗?重点说一下it used to be 后面是不是省略了东西?如果是完整的,我怎么也理解不了,怎么可能以be结尾呢?
• 一道很难的高中英语单选题--------------务必高手帮忙28、The man in the lead swung his right arm _____ a signal for us to stop.A：as if to make    B：even if to make    C：as though making    D：even though making1、请选出答案并解释原因；2、请帮忙标准翻译.
• 高中英语一道单选Nobody knows ________broke into the house last night and stole the important papers A.who was it that B.it was who that C.who it was that D.that it was who 于是完全分不清啊啊.选C,为什么其他三个不行,另外这是一个什么句?B 和D为什么不行
• 高中英语单选一道Don't just wait _______be informed 为什么不能用for being informed
• 高中英语一个单选You can not imagine that a well-behaved gentleman________be so rude to a lazy.A.might B.need.C.should D.would.选什么为什么啊~
• 一个很难的高中英语单选题----高手帮忙In my opinion,life in the twenty-first century is much easier than _____ .A：that used to be B：it is used to C：it was used to D：it used to be但是我看不懂D项,it used to be 后面是不是省略了东西?it代指什么.used to be 分词短语作it的后置定语吗？
• 一个很难的高中英语单选题-----高手帮忙33The Internet gives people the chance to have the information they look forward _____ to them quickly and cheaply.A：deliver B：to deliver C：to delivered D：to delivering1、选出答案并解释原因2、分析一下句子结构,总觉得很混乱,3、标准翻译本句.
• 一个很难的高中英语单选题—I was wondering if we could go skiing on the weekend.— It ____ good.A：Sounds B：Sounded 然后解释为什么用现在时,而不用过去时?
• 爱国主义 is one of the h____ qualities of human's.
• 求高中人教版必修一金属一章中所有涉及的化学方程式包括金属钠,铁,铝之间复杂的转化.