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1、He__toNew York tow hours ago.A、flied B、flies C、flew2、She had much fun__on the playground.A、plays B、played C、playing3、Jim decided__to theMount Wutai last month.A、go B、to go C、going4、—__was your vacation?—It was fantasti 设函数f(x)=sin（2x+μ）(-π 普通高中课程标准实验教科书】必修2如果有答案书的请把85页AB组,97页AB组答案发一下, 平面∝平行平面β平行平面r,直线a与b分别交∝、β、r于点A,B,C和点D,E,F求证：AB：BC=DE:EF 图画不出来. 求x+2x^2+3X^3+……+nx^n的值（x>0且x不等于1）如题 解方程组x+y+z=6,2x+3y-z=5,3x-y+2x=7打错了，试x+y+z=6，2x+3y-z=5，3x-y+2z=7 L-----start at half past one in the afternoon.Do you u------- how to send emails? 连词成句1.any are books there the in schoolbag2.rulers his are green这两题要连词成句,我们家长都不懂,请大家帮忙然后回答下为什么要这么连 Mr.Li was born in ______,he is _______.(Asia)The_______between Beijing and Tokyo is 2300 kilometers.(distant) 根据中文补全下列句子：我经常帮妈妈打扫房间.I often _________ Mother __________ the room.这块蛋糕比那块好多了.This cake is _________ _________ than that one. After_(come) to China,I found that my family was like a big tree.I realize that I am _ (culture) and ancestrally _(root) in China. 若三次根号x-1与三次根号2-3x互为相反数,则X=? 【高一数学】不等式.详解~~大虾们,求助~~~这是一个填空题...但是我需要很详细很清晰的步骤,那个就是书的答案,但是我看不懂是怎么来的.能详细一点么?...感谢了! 已知集合A={x|x的平方-4mx+2m+6=0,x属于R},B={x|x小于0,x属于R｝,若A与B的交集不是空集,求实数m的取值范围.注：题中部分数学符号用语言描述的,因为没有找到匹配的符号,见谅. 3x/0.5-(7*0.2-x)/0.4=1急用! 9X+0.4【2.5(3X-4)+10】=6/7【14(X+1)-28】 0.5(x-4)-(3x+4)=-7.5 若函数f（x）=mx+n有一个零点是2,则函数g（x）=nx²－mx的零点是 解三元一次方程组 X+2Y+3Z=1 X=Y+1 2X+3Y+5Z=2 英语翻译有谁能翻译一下么？ 求10道高一数学函数难题.急. 高一数学函数难题、高手请进已知f(x)=(a-2^x)/（b+2^(2x+1))若f(x)是奇函数,求：a与b的值 1.若f(x)定义在(-∞,0)∪(0,+∞)上的奇函数,且x∈(0,+∞)上为增函数,f(-2)=0.求不等式x·f(x)＜0解集.2.已知f(x)定义在[-1,1]上的偶函数,且x∈[0,1]上为增函数,满足f(a)≤f(1/2),求a的取值范围 1、若方程ax^2+2x+1=0至少有一个负数根,求实数a的取值范围2、设定义在[-2,2]上的偶函数f(x)在区间[0,2]上单调递减,若f(1-m) f(x)=x^2+(a+3)x-1在[1,正无穷）为增函数,则a的取值范围是, 高一数学,求解,第二题 关于方程 k9^x - 3k3^x+6(k-5) 在[0,2]有解,求实数k的取值范围!最好是一看就懂的. 解三元一次方程组 X+Y-Z=0,2X+Y+Z=7,4X+3Y+5Z=25 高中英语试题,加上题号哦.阅读2 谁帮我做一下以下几个英语试题-2-2题号:15 题型:单选题 内容:If he had followed the directions carefully in taking the medicine,he would have felt better ______.选项:a、much quicker b、much quickly c、more quickly d、more qui 英语试题2Glaciers begin to form------more snow falls during the winter than melts and evaporates in the summer.A is whenB when there areC whenD when does为什么选C 不是B 分解因式 （x+1)(x+2)(x+3)(x+4)-3x^ ^这个符号代表平方