平面直角坐标系中，直线y=x+3与y=-2x+6的图像

打点计时器的频率为50HZ,打出6个点距离一次为2,5,9,14,20求打B点是速度多大.CE间的平均速度 用正确时态填空I saw many people ___(walk) along the lake.为什么? 用正确的时态填空1 As my father___(leave)the house,the postman___(arrive).2.Tom___(work)in the garden while i ___(sit) in the sun.3.As i ___(walk)down the street.i___(meet)Charlie.4.While he ___(read)the letter,he __(hear)a knock at the door.5 佛跳墙是什么?怎么做?谢谢! 突然想起来一道菜,请问大家佛跳墙是什么样的?用什么材料做的? 用所给动词的正确时态填空1.We ___________(not wait) if they _______(be) late.2.You _______(lose) weight if you ________(exercise) more.3.If a bee _______(find) food,it _______(dance).4.If you _______(put) wood into water,it _______(float). 我急需一篇作文；下面详细提问：我急需的作文,内容是：在这次综合性实践活动中,你一定有不少感受和收获吧?请你写下来,字数在三百个左右,要求不写错别字,语句通顺,内容具体.注释：在 可以理解为"支点"吗? 在规划建筑图纸中,有提到交通节点,有谁知道吗? 求一篇作文叫《我们读书人》………谢 交通结点是什么意思? 结点是什么意思 英语翻译Xu zheng won a prize for hie essay about the importance of English.Later,a reporter from the school magazine interviewed him.Use the reporter's notes to write an article about Xu Zheng.NotesInterview with Xu Zheng———————— 节点是什么意思 mary ()ping-pong on weekends. a.plays b.am play c.playing d.is plays 用正确的时态填空.急My watch doesn't work.I have to have it ______ (修理).If a problem _____ (使...担忧) you , go and talk to your teacher.To develop the ______ (有实践经验的) skills of using English is very important for the Engli 什么叫佛跳墙 分解因式：四分之x2+xy+y2 2、四分之x2+xy+y2 3、a2b2-4ab+4 一女生对我说f.u.ck you 她素质低么? 提问：我的偶像作文500字,求速度 若a是方程x的平方-x-1=0的一个根,求a的三方-2a+2 013的值 我要提问想要一份关于交通安全的一篇作文大约500字左右 x2y2+xy-x2-y2＋x＋y＋2分解因式, 为什么运动速度比光速快就能看到过去发生的事情? 当速度超过光速会发生的事情?从历史角度回答.历史的变更,朝代的更替; (1-X平方）*（1-Y的平方）-4XY it was in the room ＿he had studied for three years ＿he found lost pen.A.where that B.th...it was in the room ＿he had studied for three years ＿he found lost pen.A.where that B.that that C.that when D.where when求详细分析?为什么不选B 佛跳墙是道什么菜?为什么叫佛跳墙?有些什么材料?怎么做? 已知有理数a,b满足11-6倍根号2=a-b的根号2,求a,b的值 已知a,b为有理数,且(2+√3)a+(3-√3)b=11+3√3,求a,b的值 思品家庭作业：搜集一些“黄赌毒”等身边的诱惑（游戏的诱惑、金钱的诱惑）而被影响的生活,典型的例子. 英语翻译1 .Another case in point is Citibank’s special system which recognizes atypical spending patterns in the use of credit cards,thus being able to alert customers to the possible loss or misuse of their cards.If there were no such knowledg