张宇布置的课后作业

由于上面不够写,所以问题在下面.奥数题：The coordinates of the three points A,B,C on the piane are (-5,-5),(-2,-1)and(-1,-2),respectively,the triangle ABC is( ).A.a right triangle B.an isosceles C.an equilateral triangle D.an obtu over three years的同义词 做某事有3年了,是不是都用for three years?我学这个已经3年了我教书已经3年了我训练了3年了 for three weeks 的同义词组 He has (studied) English for three years 同义词互换 a learned b heard c read d thought 请说出50种不同的植物名字,例如向日葵 She goes to the park to read English every morning. (对every morning部分提问) she goes to the park to read english every morning.对goes to the park to read English提问 英文can she goes to the park 这句,句子中哪个错了 胡彦斌的有一首 里面有歌词是什么 wating for you wating for you 什么的是什么歌 I'm wating for you…啥意思? wating for you how long have you lived in Germany?__for the past six years.A.off and on B.on and up C.about D.at least 方程2^x+2=1/(x-1)的根的范围 I like reading English in the morning（对reading English 提问）我想对reading English 提问 I like (reading English) in the morning.(对括号部分提问） He spends an hour reading English in the morning.对划线提问（划线的是an hour）____ _____ ______he _______reading English in the morning He enjoys reading English 划线提问 划线画reading English；I like to have sports 划线画have sports； We’re their sons 划线提问 划线画their ； their grandson visit them every week 划线画 ①their grandson ②every week I'd like ______ English in the morningA.reading B.to read C.read D.reads 多项式 1+xy-xy2的次数及最高次项的系数分别是最后一个式子 -xy2 中的2是指数...最近复习 全忘了. 用[x]表示不大于x的最大整数,则方程x^2-2[x]-3=0 的解的个数为(3) 若方程(logx)(logx")=4的所有解都大于1,求a的取值范围?(logax)(logax")=4 it's been six years这句话什么时态 been 的作用与时态 It has been 3 years since he came here. 150 years ago,when Western countries came to East Asia to colonize it,it was only Japan150 years ago,when Western countries came to East Asia to colonize it,it was only Japan which could confronted them.it was only Japan which could confronted them. It has been ten years now since the Labour Party came to______.A.power B.control C.force D.charge请说明理由 He__China for several years.A has been to B has come to C has been in D came to 求函数y=(3x-x^2)/(x^2-1)+1/(1-x)-2的零点 函数y=x^2-3x+1的零点个数 求函数y=(3x^2-x^2)/(x^2-1)+1/(1-x)-2的零点 函数y=2∧x+3x的零点所在的一个区间是 试找出一个长度为一的区间,在这个区间上函数Y=(x-1)\(3x+2)至少有一个零点