【单选题】A new way of teaching _____ in the article can make learning easier.
【单选题】_______ you start eating in a healthier way, weight control will become much easier.
【单选题】Looking at a situation in a new way will make _______ easier to find new solutions.
【简答题】如图18-1所示,已知二次函数 与x轴分别交于点A(2,0)、 B(4,0),与y轴交于点C(0,-8t)(t>0) 小题1:求a、c的值及抛物线顶点D的坐标(用含t的代数式表示); 小题2:如图18-1,连接AC,将△OAC沿直线AC翻折,若点O的对应点O′恰好落在该抛物线的对称轴上,求实数t的值; 小题3:如图18-2,在正方形EFGH中,点E、F的坐标分别是(4,-4)、(4,-3),边HG...
【简答题】已知:在如图1所示的平面直角坐标系xOy中,A、C两点的坐标分别为A(4,2),C(n,-2)(其中n>0),点B在x轴的正半轴上.动点P从点O出发,在四边形OABC的边上依次沿O-A-B-C的顺序向点C移动,当点P与点C重合时停止运动.设点P移动的路径的长为l,△POC的面积为S,S与l的函数关系的图象如图2所示,其中四边形ODEF是等腰梯形. (1)结合以上信息及图2填空:图2中的m=____...
【单选题】Beauty has always been regarded as something praiseworthy. Almost everyone thinks attractive people are happier and healthier, have better marriages and have more respectable jobs. Personal advisors g...
【简答题】如图所示,在梯形ABCD中,已知AB∥CD, AD⊥DB,AD=DC=CB,AB=4,以AB所在直线为x轴,过D且垂直于AB的直线为y轴,建立平面直角坐标系。 (1)求∠DAB的度数及A、D、C三点的坐标; (2)求过A、D、C三点的抛物线的解析式及其对称轴L; (3)若P是抛物线的对称轴L上的点,那么使△PDB为等腰三角形的点P有几个?(不必求点P的坐标,只需说明理由)
【简答题】It began with three friends searching for an easier way to share videos. One - Jawed Karim - uploaded the site's first clip - a movie of himself dressed in an anorak at San Diego Zoo. By the end of it...
【简答题】阅读理解。 Beauty has always been regarded as something praiseworthy.Almost everyone thinks attractive people are happier and healthier,have better marriages and have more respectable occupations. Personal...