a²+b²-c²+2ab除以a²-b²+c²+2ac高手请帮忙,

相关推荐

• 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.
• 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.
• 一个很难解释的高中英语单选题----高手帮忙4、In 2010, urban and industrial water users in Beijing and Tianjin will be expected to use water _____ from Changjiang River by the project’s east and middle lines.A：that is taken B：taking C：taken D：being taken答案是C选项,但是我记得老师说过,过去分词表示动作发生在谓语动作之前,即take发生在will be expected 这个将来时之前,我对这个时间关系有点晕,到底哪个动作先发生的.高手详解,如果我理解的有误,请指出来.谢谢你们俩人,不是高手,记住了 我说的是高手回答,你们来凑什么热闹?
• as long as与as soon as的区别我在仁爱英语时报上见到了这样一个题目弄不明白请大家帮忙看一下:____you have a chance to study in a foreign country, just take it.A.As soon as B.As good as C.As well as D.As long as我觉的D有道理,引导条件状语从句,"只要".可我又觉的A也有道理,引导时间状语从句,"一就"到底是哪一个,他们之间有区别吗?名位朋友，我主要是想知道为什么？As soon as不行！能给个理由吗？
• 5.已知函数f(x)=x+ 根号2除以X 的定义域为(0,正无穷).设点P是函数的图像上的任意一点,过点P分别作Y=X直线和Y轴的垂线,垂足分别为M,N,则PM*PN的绝对值为（ ）（A）1.（B）2.（C）3.（D）4.请加以分析.
• 使用价值、价值、交换价值的关系是（）.A.无使用价值就不可能有价值　B.有使用价值就一定有价值C.无论交换价值还是价值,都是商品的社会属性　D.无论交换价值还是价值,都是商品的本质属性　请高手选择并分析.多选.
• 3的a次方=7,3的b次方=14,3的c次方=28,试确定abc之间的关系各位高手请帮帮忙,谢谢了!好的话再加分!
• It's strange that he ____ interest in much of his research.A.should have lost B.would lose C.had lost D.will lost应该选什么?请帮忙翻译下.
• 4(x+1)=3(x+2)怎么解
• (x的平方-2x)的平方-1=