(3.8-0.2)÷2+0.2=2
最新问答: 已知向量a=(√3,-1),b=(1/2,√3/2),是否存在不等于0的实数k和t,试x=a+(t^2-3)b,y=-k 如图,等腰直角三角形ABC中,∠BAC=90°,D、E分别为AB、AC边上的点, 初二应该用哪些东西?比如圆规,尺子,笔,笔记本,书夹等等 昆虫记语言特点是什么? I don't like this book.could you give me ____ one? enjoy的用法enjoy doing 还是enjoy to do?最好具体说明可是曾经在报纸上看过enjoy to d All finished,we sat down to enjoy what we thought the most d most people feel ____(frighten) when they se snakes. I still don't know what ___while I was away from home . 根毛细胞与叶绿体同时放入蒸馏水中谁先破裂 命题:“若a=根3*根5,b=根3+根6,则a>b”是真命题还是假命题?说明理由 求助一英语语法知识点she treats me as if i was her daughter.这里为什么用was而不 (2014•贵阳模拟)已知函数f(x)=ln(-x)+ax-[1/x](a为常数),在x=-1时取极值 reason是可数名词吗 先简化,再求值!已知A=4a²+5b,B=-3a²-2b,求2A-B的值,其中a=-2,b=1 有初一英语试卷吗?(含答案) (2009•潍坊二模)已知函数f(x)=x(x-a)(x-b),其中a、b∈R 三角函数有界性的适用范围求函数y=x+根号(x2-3x+2)的值域 可否运用三角函数有界性? 英语翻译However,where measurement techniques are being used in a 铁丝在氧气中燃烧时为什么要拧成螺旋状