双十双百

求未知数2 已知集合M=｛y|y=x²-2x+3｝,N=｛y|y=2x²-3x+1｝则M∪N= 小明在计算4.87减一个三位小数时,粗心把数的末尾对齐了,得到的结果是1.39,你能算出这道题的正确答案吗帮帮忙 已知a是|-2|的相反数,b的3的倒数的相反数,c是-3分之1的绝对值的倒数的相反数,d是-2又3分之2的绝对值.求|a|-|b|-|c|+|d|的值 小学四年数学应用题 小学四上数学应用题要鄂教版的,50道题,急啊! 在没有学过小数除法的情况下,以下应用题怎么解答：1千克芝麻可以榨油0.42千克,100千克芝麻可以榨油多少千克?如果要榨4.2千克的油,需要多少千克芝麻?没有学过小数除法，怎么用除法啊？ 英语翻译我想问下半句话的意思是 下面哪个选项代表的数的下一个奇数比x大 还是 下面哪个选项代表的数的下一个奇数比x大？ 【GRE数学】If x is an odd integer,for which of the following equations must y be an even integer?RT 其他选项都排除了,只剩x+2y=7 & 2x+y=6PS.by the way,integers between 1 and 100,包括1和100这两个数吗? [GRE数学]If -m/19 is an even integer,which of the following must be true?问m是什么数.给出五个选项,分别是 A:negative number（负数）,B:positive number（正数）,C:prime number（质数） ,D:odd integer（奇数） ,E:even integer 暑假你去小明家玩,正巧小明过生日.他和他的亲友邀请你吃饭.席间,你得向小明表示祝贺,你会怎样说?急. 一个长方形的周长是36米 他的面积最大是多少平方米? The growing speed of a plant is influenced by a number of factors,____beyond our control.选most of them,为什么不是most of which?这是高中那一块的语法?谢 (-2)的平方-|-7|+3-2乘(-2分之1)-9除以3+（2分之1-3分之2）乘12+3的平方0.25乘（-2）的立方-[4除以（-3分之2）的平方+1]-2的平方-（-2）的平方+（-3）的平方乘（-3分之2）-4的平方除以|-4| The growing speed of a plant is influenced by a number of factors,______ are beyond ourcontrol.A.most of themB.most of whichC.most of whatD.most of that为什么不选A 帮我解决四道数学计算题.（2 3/4）+（+2.47）+（1 1/2）+（+1 2/3）+（-1.07）4.4+（-1/3）+（-13）+（-3 2/3）+（-24）2.75-（-1/2）+（-5/6）-（-3/8）+4 1/3 -0.5+3 1/4+2.6-5 1/2+1.15写成省略加号的和的形式。晚 The growing speed of a plant is influenced by a number of factors,____are beyond our control.A.most of them B.most of which C.most of what D.most of that 1） [(X+3)^2+(x+3)(x-3)]/2x2) (x+1)^2+2(1-x)-x^23) (a-1)^2(a-1)^2(a^2+1)^24) (x-2y-1)(2y-x-1)需要计算过程 the growing speed of a plant is influenced by many things __ are out of our controlA that B whose C which D where 为什么填B The number of teachers in our school _ growing.A.are B.am C.is D.have( )_anybody hurt?No,everyone was safe.A.Does B.Did C.Is D.Was 一个长方形的周长是30厘米,长与宽的比是5:1,长是（）厘米,宽是（）厘米,面积是（）平方厘米. 若绝对值2A-5与跟号(B+2)互为相反数,求AB的值 2a-b的绝对值与根下b+2互为相反数,求ab的值. 已知2a－6的绝对值与b－2的绝对值互为相反数求ab的值 the number of different prime factors of 48.和the number of different prime factors of 72 number of 和 account of 区别the number of 和the account of 区别怎么用错了不是 account of ,是 the amount of 分解因式x的二次方-10x+24 一个长方形的周长是30厘米,相邻两条边的比为3:2.这个长方形的长和宽各是多少厘米? 已知y=y1+y2且y1与x成正比例,y2与x平方成反比例且x=2 y=-3时,y的值都等于19,则y与x的函数关系式是______ the number of,a small number of,a number of.,a great number of,a large/small number of,区别和后面该接可数和不可数名词 A great number of与the great number of_____children whose parents had died in the earthquake ____sent to live with families in other cities.A.A great number of,was B.A great number of,were C.The great number of,was D.The great number of,were为什 a number of , a small number of , a great number of各是什么意思