母亲在现代中国教育中的作用

若点A(X,Y)在坐标轴上,则（ ）A.X=0 B.Y=0 C.XY= 0 D.X+Y=0 当x->0,y->0时 为什么lim(xy)/(x+y) 不能同除xy?答案说是同除排除了沿坐标轴靠近原点的情况.能具体解释下唯有感激. 1.若点p(a 5,a-3)在x轴上,则点p的坐标为什么.2.若点p(x,y)的坐标x,y满足xy=0,则点p的位置在什么.3.这个是应用提要过程,在平面直角坐标系中,点a,b的坐标分别是(0,－2),(0,2),点c在x轴上,如果角abc的面 函数f（x）=4x^2-4mx+m^2-2m+2(m∈R）的最小值 函数y=4x^2-4mx+m^2+2(m属于R)在区间[0,2]上的最小值是3,则m等于 --Is that the small town you often refer to?--Right,just the one____you know I used to work for years.A.thatB.whichC.whereD.what(2005福建卷)分析：由语境和句子结构可知,you know为插入语,将其去掉更易看出the one是指the small 据意填词 V___ is a small town in the countryside 初中英语语法.. 英语 句子判断My hometown is a small town that near the seaMy hometown is a small town that near the sea 对不?(kuaiyidian) 初中英语语法重点 The town where i grew up is small.请问这句话的宾语是什么. ours is no longer the small townours is no longer the small town _____ it used to beA.what B.that选B.为什么what不对啊 直线kx+3y-9=0与直线x-3y+b=0关于原点对称,求k和b的值. 若函数f(x)=(m-2)x²-4mx+2m-6的图象与x轴的负半轴有交点,求实数m的取值范围. 直线ax+3y-9=0与x-3y+b=0关于直线y=-x对称,求a,b 直线ax十3y一9=0与直线x一3y+b=0关于原点对称,则a,b的值是? 直线ax+3y-9=0与直线x-3y+b=0关于原点对称,则a,b依次是 1.用ignore的适当形式填空.————by the host at the party ,he was unhappy .2.完成下列句子.（1）He ————（受了好多苦,注：用上suffer）when he was a child .（2）Do you often————（遭受头痛的折磨吗, 1、shouldn't have done mustn't have done can't havedone 有什么区别？请举例2、a second time the second time 3、in good order 和 in a good order 什么区别？4、作文中可以运用的连词 如 、 因为 但是 所以 有没有什么 I have to move to a city. There are no jobs in the small town where I live. 根据这句话写一篇英语短 Do you live in a big city or a small town?的翻译 I live in a small village.But my school is in a big town.There are many different kinds of shops 英语翻译重点解释because之后的部分,有什么固定短语及语法知识? 初中英语语法,要初一和初二的 有没有初中英语语法总结(人教版) a*5.8省略乘号写为什么 省略乘号写出下列各式 b×4 X×b×5 7×X×X省略乘号写出下列各式b×4 X×b×5 7×X×X a+a+a 3*x/3*x乘号可以省略吗? 1.Our country has a _____history of 4,000 years.A.recording B.record C.recorded D.records2.Chairman Mao called on the people to _____Lei Feng.A.learn from B.learn C.study from D.study3.-How do you think we can keep fit?-Oh,I____doing morning exercise 1.在年轻人的字典里没有失败这个词in the dictionary of youth,__ __ __ __ __ __ __.2.他的英语说得不好,这是因为他从来不努力学习he can't speak english well,__ __ __ he has never worked at it.下面是补全单词1.i deci 我不开心 翻译成英语 已知函数f(x)=ax2+(2a-1)x-3 (a≠0)在区间[-3/2,2]上的最大值为1,求实数a的值.