题目

某学校为了支持生物课程基地研究植物生长，计划利用学校空地建造一间室内面积为900m2的矩形温室，在温室内划出三块全等的矩形区域，分别种植三种植物，相邻矩形区域之间间隔1m，三块矩形区域的前、后与内墙各保留 1m 宽的通道，左、右两块矩形区域分别与相邻的左右内墙保留 3m 宽的通道，如图．设矩形温室的室内长为（m），三块种植植物的矩形区域的总面积为（m2）． （1）求关于的函数关系式； （2）求的最大值．完形填空阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并从答题卡上将该选项涂黑。When I was a teenager I volunteered to work at the water station at a 10,000m race. My job was to _________ water to the runners. I remember being so _________ to see all the different kinds of people who passed by and grabbed a cup of water. Some ran past, some walked past and a few wheeled past. I saw so many types of people doing it. I thought maybe I could do it too! So the next year I _________ up for the race.That first 10,000m race was quite an _________ . I jogged, I walked, I jogged and I walked. _________, I didn’t know if I could finish. Then came a defining (决定性) _________ .At one point near the end, a 70-year-old man ran past me, very, very fast, and I felt _________ because I was 50 years younger than he but I couldn’t even keep up with him. I felt _________ for a second.But then I _________ something. He was running his race and I was running mine. He had _________ abilities, experience, training and goals for himself. I had mine. Remember my _________ was only to finish.After a minute, it _________ me that this was a lesson I could draw from. I learned something about myself in that moment. I turned my embarrassment into _________ .I _________ that I would not give up on running races. In fact, I would run even more races and I would learn how to train and prepare _________ and one day I would be one of those 70-year-old persons who were still running. As I crossed the finish line, I was proud of my _________.In life we all have those moments where we _________ ourselves to others. It’s only _________ . Don’t allow those moments to _________ you. Turn them into motivation and let them inspire you. With the proper preparation and training, you can improve your result to _________ anything you want in life.1.A. bring out B. pass out C. take out D. pick out2.A. excited B.worried C. concerned D. anxious3.A. gave B. made C. signed D. dressed4.A. achievement B. encouragement C. instruction D. experience5.A. At times B. In time C. In all D. After all6.A. victory B. decision C. moment D. conclusion7.A. embarrassed B. annoyed C. moved D. thrilled8.A. relaxed B. defeated C. puzzled D. inspired9.A. realized B. lost C. noticed D. remembered10.A. special B. evident C. common D. different11.A. motto B. plan C. goal D. direction12.A. worried B. hit C. reached D. hurt13.A. attraction B. devotion C. inspiration D. expectation14.A. hoped B. promised C. decided D. suggested15.A. slightly B. hardly C. clearly D. properly16.A. excitement B. accomplishment C. movement D. judgement17.A. introduce B. relate C. present D. compare18.A. important B. natural C. strange D. ridiculous19.A. weaken B. wound C. amuse D. cheer20.A. reserve B. deliver C. achieve D. Abandon