题目

通过一年的化学学习，相信你已掌握了实验室制取气体的有关知识．请结合图示回答下列问题．（1）请写出图中标号a、b仪器的名称：a；b ． （2）实验室常用过氧化氢溶液和二氧化锰混合制取氧气，发生反应的化学方程式为 ， 选用的发生装置是 ， （填装置序号，下同）收集装置是 ． （3）F装置可用来测量生成的CO2气体的体积，在水面上放一层植物油的目的是 ， 植物油上方原有的空气对实验的结果（填“有”或“没有”）明显影响．    School is very important for people to get knowledge. Many people go to      36     for education. The aim of students is to study better. But to study needs a right way, or you will     37     your time or money. Here is the advice about study. School education is very important and useful, but no one can learn everything from school . A teacher, no matter   38     he knows, can't teach his students everything. His work is    39     his students how to learn. He teaches them how to read and how to think. So much more is to be learned outside school   40      the students themselves. It's always    41     to know how to study by oneself than to learn some facts or formulas(公式) by heart. It is quite    42     to learn some facts in history or a formula in math, but it is very difficult to use a formula to work out a math problem. Three great scientists: Newton, Edison and Einstein, didn't get everything from school. But they were all    43     . The reason for their success is that they know how to study. They learnt many knowledge by    44    . They  worked hard all their lives. The most important thing is that they know how to use their brains. Though  there are many ways of studying, this one is quite enough   45      you can understand and use it.                      36. A. university                        B. school                   C. home          37. A. waste                             B. spend                     C. save 38. A. how                              B. how much                    C. when                 39. A. to study                           B. to know                      C. to show               40. A. for                               B. by                       C. from                41. A. more useful                         B. more important                C. more interesting          42. A. easy                                     B. hard                       C. boring 43. A. clever                            B. hard-working           C. successful 44. A. them                              B. themselves             C. oneself               45. A.  if                                   B. yet                             C. or