中国对外越来越强硬

1、分子：a平方—4a平方 分母：—4a+42、分子：x平方—2xy+y平方 分母：y—x 8x平方（x—y）三次方/6x（y—x）平方 化简题.化简,(a^-3b^4)^2乘(3a^2b)^-2.(x+y)乘x^2/x^2-y^2+y^2/y-x.y-3/4y-8除(y+2-5/y-2).解分式方程,2/2-x+x^2-1/x^2-4+1/x+2＝1. 把过程写下来 she walks in the garden f_______ about half an hou填一个f开头的词,符合句意.抱歉 最后是hour She walks in the garden for about 30 minutes(改为同义句并且对划线提问）划的是for about 30 minutesShe walks in the garden for about 30 minutes(改为同义句）She walks in the garden for about —— —— —— A:Where is Lily?B:She ____ for about half an hour.A.has leftB.has goneC.has been awayD.went She goes running for half an hour every morning .(意思一样）It takes _____ half an hour to _____running every morning Kitty and Alice are asking Winnie about where she has been in Garden City.(中文翻译） Mr.Green e___ in the garden foe half an hour every day. 已知函数f(x)4的x次方/(4的x次方) +2求f(2008分之1)+g(2008分之2)+f(2008分之3)+…+f(2008分之2007)的值 已知|a-1|+(ab-2)的2次方=0求x/ab+x/(a+1)(b+1)+...+x/(a+2007)(b+2007)=2008的值 a half hour later\after half an hour\after half an hour later\half an hour later分别是什么意思? 若关于x的一元二次方程x^2-x+k=0(k为常数)有两个相等实数根,则k=____ 如果关于x的一元二次方程x²-x+k=0(k为常数)有两个相等的实数根,那么k__ （ ）It took him half an hour to walk ＿＿＿ the（ ）It took him half an hour to walk ＿＿＿ the forest.A.across B.over C.cross D.through It took them half an hour by bus.(改为同义句) The—— ——took them half an hour. it took them harf an hour by bus.(改为同义句) the _ _ took them half an hour. it took him half an hour to walk____the forest.A.crossB.overC.croosD.through 已知a满足|2007-a|+跟号a-2008=a,那么a-2007^2的值为 The child with his teacher often ____(run)for half an hour in the morning.填动词形态. These children often____their teacherA:play an important role inB:keep a check onC:play a trick on D:keep track of 选哪个?为什么?（我现在正在初学英语, The children often help____(帮助） in their study. the ___ (child) are talking to their teacher. Children give their fathers presents or tret them to dinner.At the weekend our teacher often giveus a lot of homework to do ,这两句中的 to各是什么用法 如果f(a+b)=f(a)+f(b),且f(1)=2,则f(2)/f(1)+f(4)/f(3)+f(6)/f(5)+…f(2006)/f(2005)+f(2008)/f(2007)=? a+2/3=b/4=c+5/6,且2a-b+3c=21,试求a:b:c的值. 倒数的大小与原来两数的大小之间的关系是什么 倒数的大小与原来两数的大小之间有什么关系?（要准确啊） 一个零件只有3毫米长,画在图纸上的长是8厘米,这幅图的比例尺是( a、b互为倒数,如果A=1+a分之一+1+b分之一,B=1+a分之a+1+b分之b,比较A、B两数大小.A=(1+a/1)+(1+b/a) B=(1+a/a)+(1+b/b) 加括号的是一个数 a、b互为倒数,如果A= 1\1+a + 1\1+b ,B= a\1+a + b\1+b ,试比较A、B两数的大小.