一元二次方程有几个根

有两数相差60,其中大数的1/10是小数的1/3.两数之和是多少? 新课标下的中学语文教学应重视什么 如图,两圆交于点A,B,大圆的弦AD交小圆于点C,小圆的弦BF交大圆于点E,试探究CF与DE的位置关系 求到点A(-1,0)和直线χ=3距离相等的点的轨迹方程 下面的汽车图分别是在汽车的哪个位置看到的? 全球气候变暖对南极企鹅有影响吗 求到点A(1,1)和点B(-3,-5)的距离相等的点的轨迹方程 数据结构,算法题划线处的语句,作用是什么? 求问气候变暖对企鹅都有哪些影响 气候变暖对企鹅都有哪些影响我在环球奇观频道上看过一个有关企鹅的,说是气候变暖对企鹅的影响很大,气候变暖使很多种企鹅的生存环境小了一半,如果全球气温再升高2度. 童乐厂生产一批儿童玩具,第一周完童乐厂生产一批儿童玩具,第一周完成了这批玩具的25％,第二周完成了这批玩具的30％,第二周比第一周多生产了450个玩具.这批玩具一共有多少个?（用方程解 你看可以吗用英语怎么说is that__ __ you? 当你打电话询问对方是谁时,你可以说_________ (选择A还是B） A.Who are you B.Who is that 到定点(0,-1/2)和定直线y=1/2的距离相等的点的轨迹方程 如图,在直角坐标系中,每条横线和竖线代表一条路,小明从学校（点O）放学回家（点P）,沿途依次经过超市C,书店B,邮局A,请你画出最短的路径,用点的坐标表示依次经过的十字路口,请问最短路 请问3A跟3B的证书一样吗? 3A和3B文凭有什么差别,3A和3B最大的差别在哪里? 数学证明题.设a 已知a^2/3+b^2/3=4,x=a+3a^1/3b^2/3,y=b+3a^2/3b^1/3,证明：(x-y)^2/3+(x+y)^2/3的值与x、y的取值无关 一句英文求各位大侠帮忙After June 30,2013,a drivermay not take an off-duty period to restart the calculation of 60 hours in 7 consecutive days or70 hours in 8 consecutive days until 168 or more consecutive hours have passed since thebeginni 73*26*24简便方法怎么做 英语翻译请不要拿词典工具翻译 有的会翻译错了 1.为了在天黑前到达,我们早早动身2.那房子就在下雨拐角处,你不会找到的3.他们对我的询问很快做出了答复4.顺便问一下你收到那封信了吗5. 英语翻译Linear movement of conrods is translated into the rotary motion of the crankshaft by a central sliding bearing TWO:Fill in the blanks with"notice"or"pay attention to"in their correct forms:A 1、If you___what he said,you could have avoided repeating such a had mistake.2、Mr.White didn't know I was in his office.He was too busy to___me.3.On the way home from 鲟鱼鱼子酱怎么做 1.It rained all day yesterday._____________?2.She is a beautiful lady.____________?3.They were in college five years ago______________?4.She had lunch at school.________________?5.Mr.Green has a big house with a rice garden.___________?举例：It's “新华书店位于邮局和超市之间.”的英文怎么写?SOS!Xin Hua library between the post office and the shop. 题号:18 题型:单选题（请在以下几个选项中选择唯一正确答案） 本题分数:5内容:The men were provided ______ blankets against the cold.选项:a、by b、 with c、 at d、 for 题号:19 题型:单选题（请在以下几个 超市、书店、玩具店依次坐落在一条东西走向的大街上,超市在书店西边20m处,玩具店位于书店东边50m处.小明从书店出来沿街向东走了50m,接着又向东走了-80m,此时小明的位置在何处?在数轴上标 《林琴南友菜佣》一文中“以供甘旨外”的“以”什么意思,要准确翻译 单项选择1.It is not easy____ a foreign language.A.to learn B.learning C.for learning D.learn2.Would you please show us where____?A.going to B.to go C.go D.going3.He got up early___ the early bus.A.to catch B.catching C.caught D.catch 4.Have you g 2/3a-(2/3a-2/3b)-3/4b