题目

甲、乙两人利用不同的交通工具，沿同一路线从A地出发前往B地，甲出发1h后，y甲、y乙与x之间的函数图象如图所示． （1）甲的速度是km/h； （2）当1≤x≤5时，求y乙关于x的函数解析式； （3）当乙与A地相距240km时，甲与A地相距km． 答案：【考点】一次函数的应用． 【分析】（1）根据图象确定出甲的路程与时间，即可求出速度； （2）利用待定系数法确定出y乙关于x的函数解析式即可； （3）求出乙距A地240km时的时间，乘以甲的速度即可得到结果． 【解答】解：（1）根据图象得：360÷6=60km/h； （2）当1≤x≤5时，设y乙=kx+b， 把（1，0）与Sometimes people come into your life and you know at once that they were sure to be there. They serve some certain purpose,teach you a lesson or help find out who you are or who you want to become. You never know who these people may be: your classmate, neighbor, tcacher, long-lost friend or even a real stranger. But you know that every moment they will influence your life in some serious way.Sometimes things happen to you. At the time they may seem terrible. painful and unfair. But later you realize that without overcoming those diffiulties, you would have never realized your further ability and advantages. Everything happens for a reason and nothing happens by chance or with good or bad luck.The people you meet influence your life, and the sucess and failure you experience create who you are. Even the bad experience can be leared from. In fact, they are probably the most poignant and important oncs.Enjoy every day even every moment and take from it everything that you possibly can，for you may never be able to experience it again. Talk to people whom you have never talked to before, and really listen. You should set your goals high，hold your head up, tell yourself you are a great one and believe in yourself.You can make your life anything you wish. Create your own life and then go out and live it.【1】The people we meet ______.A. all know where to find usB. serve us on no purposeC. won't become our neighborD. will change us in some way【2】From the passage. we know that bad things can make us ____.A. realize our further abilityB. terribly meet bad luckC. find no serious successD. possibly enjoy every moment【3】The underlined word “poignant”in the passage means“_______ ” in Chincse.A. 平淡的 B. 明显的 C. 深刻的 D. 艰苦的【4】The writer's advice is that we should _______A. never talk to strange peopleB. learn as much as we can each dayC. overcome difficulties painfullyD. not believe in ourselves but others【5】Which is the best title for the passge?A. Create your own lifeB. Hold your head upC. People you meet in lifeD. Things happen to you