双因素理论中的保健因素是指

无论x取何值,代数式-3x^2+mx+nx^2-x+3的值总是3,求m和n的值急.. b值的计算后两步是怎么算的 根据下列所示的程序计算的y值,若输入的x值为-3,则输出的结果为（ ） A.5 B.-1 C.-5 D.1 请问下y=√x-5+√5-x+3.求x+y的值 这题怎么算啊, 若多项式(1+x)^16=a0x+a1x^2+…+a16x^17,求(a1+2a2+3a3+…+8a8)*2^(-16)的值?无知者，勿扰！ 已知(x^2-x+1)^23的展开式是46次多项式,设为a0+a1x+a2x^2+…+a46x^46,求a0+a1+a2+……+a46的值 ｜x-3｜＝2求解题过程 请帮忙分析此英文句子的句子结构（越详细越好）The masses are more likely to replace an unchanging ritual by fashion which it will be in the economic interest of certain people to change as often as possible.fashion后面有which 已知一次函数y=（3-k）x-2k的平方+18.1.k为何值已知一次函数y=（3-k）x-2k的平方+18.1.k为何值时,它的图像经过原点?2.k为何值时,它的图像平行于y=-x?3.当b为何值时,y随x的增大而减小? 最小的非负整数是?如果一个数的相反数是最小的非负整数,那么这个数是? 最小的非负整数是什么? 最小的负整数是多少最小的正整数：1 最小的负整数：最大的负整数：-1 最小的整数=最小的负整数 最小的负整数是什么? 最小的负整数 (3-4x)^9=a0+a1(2x+1)+a2(2x+1)^2+.+a9(2x+1)^9则a1+2a2+3a3+...9a9=? 若(2x-3)^5=a0+a1x+……+a5x^5,则a1+2a2+3a3+4a4+5a5= she has a small sports collection什么意 三个连续的奇数中,如果中间一个数书a,那么前面一个数是（）,后面一个数是（　） 为什么这样就是常数列 甲乙两人从四门课程中选修两门,则甲乙所选的课程中至少有一门不相同的选法为什么有30种? Lucy has to wear sports shoes for gym class的同意句怎么说七年下课课集训里的 甲,乙两人从四门课程中各选修两门,则甲乙所选的课程中至少有1门不相同的选法 （）you have to wear a unifrm at school?用can,can't,do,don't,have to填空 Yes,we（） 已知（x^2+1）（x-1）^9=a0+a1x+a2x^2+……a11x^11 求（a1+3a3+……+11a11）^2-(2a2+4a4+……+10a10)^2 关于定语从句 主谓语定状补 句子结构分析 越细越好10,We travelled together as far as Chicago,______ we said goodbye to each other.A:which B:whenC:why D:where11,The matter______ you were arguing about last night has been selttled.A: 焦橘什么意思? 古文《陆绩怀橘》中"术令人出橘食之"里的"食"是什么意思?如题, 陆绩怀橘中的术出橘中的出是什么意思? 出橘食之什么意思 If anyone ever asks how old she is ,she always answers,“It must be terrible to be growing up.”growing--grown 1.Why do we students study hard for2.Mr zhang made a speech in the end of the meeting.3Would you please wake up me early tomorrow morning?4.His father is far too busy having a rest for a while. once there lived a boy was very fond of reading.but he was poor.so he had to borrow them from a rich man lived far away.在boy后加who；man后加 who请问能不能把was删去,用very fond of reading 做定语?能不能把lived改成living?