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的阅读题 How can we create the positive change in the world?With many competing needs,it can seem overwhelming to decide where to put our energies.( ) Spread Peace in Small Ways Sometimes just a smile can bring peace to someone ( ).Staying out of 某一个产业占的比重比较大,是不是指它的GDP贡献率比较大. Some of the boys ________(listen) to music 200分!一块三角形煎饼,要把它分成大小相同(面积相等)的6块应怎样分只能切三刀,最好有图片（要四种方法） 一个三角形的煎饼,要把它分成大小相同的6块,只能切三刀,怎么切 怀念一种声音小作文100—150字 好词好句 1500字 急啊~~~~~~~速度啊要1500字 分解因式a²-16(a-b)² 因式分解：4（a－b）²－16（a－b）² 列式计算（六年级）急!一个数的5分之4比它的4分之3大20,这个数是多少? 圆X²+Y²-2X-2Y+1=0上的点到直线X-Y-2的距离的最大值为 已知直线l:x-y+4=0与圆C:(x-1)²+(y-1)²=2,则C上各点到l的距离的最小值为多少? 求解MATLAB解方程问题.A=[0.144 0.165 0.184;0.144 0.166 0.196;0.145 0.167 0.204;0.145 0.168 0.214;0.147 0.175 0.263];B=[0.149 0.187 0.181;0.158 0.207 0.197;0.159 0.219 0.206;0.160 0.229 0.214;0.175 0.286 0.257];C=[0.165 0.174 0.181;0.188 0.189 0 matlab解方程 x*e^(-n*t)-x*e^(-m*t)-y*e^(-m*t)+y*e^(-z*t)-c=0syms x1 x2 x3 x4 x5 x6 x7;>> t=[0.25,0.5,0.75,1,1.5,2,2.5,3,3.5,4,4.5,5,6,7,8,9,10,11,12,13,14,15,16];>> c=[30,68,75,82,82,77,68,68,58,51,50,41,38,35,28,25,18,15,12,10,7,7,4];>> [x,y,z,m, 49(a-b)²-16 -4（a-b）²+16(a+b)² 49（a+b）²-16（a-b）²因式分解 地磁场 (15 22:41:54)在地球表面的某位置,发现能自由转动的小磁针静止时沿竖直方向,且S极向下,则该位置是（       ）.    A.地理北极附近      三角函数的题目,该题是不是有问题 关于三角函数的题 已知向量a=（2cosωx,cos2ωx）,向量b=（sinωx,1）,（ω＞0）令f(x)=向量a点乘向量b,且f(x)d的周期为π.求f（4分之π）的值,写出f(x)在,[—2分之π,2分之π]上的单调递增区间 急用matlab求二元三次方程组及程序代码!方程：-100/x^2/y+17/40/x^3/y^2+7505627081381631/9007199254740992/x^2=0,-100/x/y^2+17/40/x^2/y^3=0我输入 clear;>> syms x y;>> [x,y]=solve('-100/x^2/y+17/40/x^3/y^2+7505627081381631/900719925474 求matlab高手求一个二元非线性方程组的根,并说明是最大值还是最小值原函数是 L= (757871*sin(2*a)*(5/2 - h)^(1/2)*((400*2^(1/2)*109^(1/2)*(h + (5/2 - h)^(1/2)*((502423*cos(a)^2)/12500 - 13579/625))^(1/2))/37 + (400*2^(1/2)*1 钓鱼岛2012年大事记, 汉能2012年发生过什么大事记? 比值和比例有什么区别 MATLAB求解线性方程组现有方程z=a*x^2+2*b*x*y+c*y^2+d*x+e*y.利用已知量xi,yi,zi（i=0,1,2,3,4）,解出方程的系数a,b,c,d,e.5个方程,解5个未知数,理论上应该是可以解出来的.结果请把系数a,b,c,d,e用xi,yi,zi的表 Do you like working in China now?Yes,v____m______.该添什么 good morning,dave.good morning,mary.next lesson is (),you know.yes,do you like chinese?yes,i th每空一词good morning,dave.good morning,mary.next lesson is ( ),you know.yes,do you like chinese?yes,i think it's( ).it's really interesting.is it you ( --- Hao do you like the reading club?---______ A Yes,I like.B Yes,I do.C Very much.D It's good正确答案是选C,可Hao do you like不是“你觉得...怎么样”的意思吗?应该选D啊! Do you want to see Hero?A.yes,that sounds good .B.yes,i can C.i like it D.No,i can't do you like grapes?是yes,I like,还是yes,I do. 9(a-b)²+12(a²-b²)+4(a+b)²因式分解