题目

25℃、101 kPa下，2g氢气燃烧生成液态水，放出285.8kJ热量，表示该反应的热化学方程式正确的是（  ） A．2H2（g）+O2（g） == 2H2O（1）       △H＝ ―285.8kJ／mol B．H2（g）+O2（g） == H2O（1）        △H＝ ―285.8kJ／mol C．2H2（g）+O2（g） == 2H2O（g）       △H＝ ―571.6 kJ／mol D．2H2（g）+ O2（g） == 2H2O（1）      △H＝  +571.6 kJ／mol Johnnie Martin was born in a worker's family. His parents lived a simple life, saving money for the day when they could send him to a good university. They had dreamed that their son could get a good ____ and live a better life. However, to Johnnie, school lessons seemed like a wall that was impossible to go through.One day when he was in Grade 11, Johnnie went ____ the school psychologist's (心理学家的) office to ask for help.“Johnnie, I've been studying your marks of all the tests at school. I've made a ____ study of them,” said the psychologist.“I've been trying hard,” Johnnie was about to ____．The psychologist put his hand on the boy's shoulder, “People have different kinds of talents, Johnnie. There are painters who were ____ able to learn Maths, and engineers who can't sing on key. Some day you will find __ you are good at, and when you do, you will make your parents and all of us very ____ you.”Johnnie didn't go to university. He found a job working in the garden around the town. Soon ____ amazing happened. His customers began to notice that Johnnie had what they called a “green thumb”. The plants he ____ grew, and the roses blossomed (开花). People started to accept his ____ for gardening, because he had an eye for colour and light.One day while he was downtown(在市区), he happened to ____ an unusual dirty land behind the city hall. He volunteered to make it into a garden. That very afternoon as soon as he got the permission (许可), he started the work, ____ he couldn't afford all the tools or the plants that were ____ for it. People gave him young trees, rose?bushes, benches and many other things. Before long, it had become a beautiful little ____．Today Johnnie is the head of the business in gardening. Wherever he and his men go, they ____ beauty before the eyes of people.1.A. job B. garden C. lesson D. present2.A. into B. past C. along D. through3.A. funny B. public C. careful D. similar4.A. lie B. cry C. laugh D. agree5.A. always B. usually C. sometimes D. never6.A. how B. when C. what D. where7.A. strict with B. proud of C. angry with D. sure of8.A. nothing B. anything C. something D. everything9.A. picked up B. pointed at C. talked about D. looked after10.A. suggestions B. invitations C. situation D. attention11.A. buy B. rent C. clean D. notice12.A. but B. and C. so D. or13.A. common B. natural C. possible D. necessary14.A. farm B. lake C. park D. market15.A. find B. spread C. collect D. describe