题目

化学是一门以实验为基础的科学。下列仪器用途不正确的是（ ） A．A                          B．B                           C．C                           D．D 答案：A 【详解】 A、量筒只能用于量取一定体积的液体，不能用作反应容器，故用途不正确； B、试管可用作少量试剂的反应容器，故用途正确； C、烧杯既可用于配制溶液，又可用做反应的容器，故用途正确； D、酒精灯是实验室中最常用的热源，可用于给物质加热，故用途正确。 故选：A。 完形填空      Isn't it amazing how one person, sharing one idea, at the right time and place can change the course of your life's history?When I was 14, I was a high school_1_with learning disabilities.     One day I met an old man, a bum (流浪汉). He asked me if I was running away from home, because I looked so_2_.Then he told me he had something grand to show me and_3_with me.We walked to the downtown Library.     The bum first brought a couple of old  4   and then started with a few  5   that were very special and that changed my life.He said, "There are two things I want to  6   you.Number one is to never  7   a book by its cover, for a cover can fool you."     He followed with, "I'll  8  you think I'm a bum, don't you?"     "Yes, I  9   so, sir."     Well, young man, I've got a little  10   for you.I am one of the  11   men in the world.I have probably everything any man could ever want.But a year ago, my wife  12  , and since then I have been deeply  13  on life.I realized there were certain things I had not yet experienced in life, one of  14  was what it would be like to live like a bum on the streets.For the past year, I have been going from city to city doing just that.So, you see, don't ever judge a book by its cover, for a cover can fool you.     "Number two is to learn how to  15  .For there is only one thing that people can't    16   away from you, your wisdom."He  17   my right hand and put it upon the books he'd  18   from the  shelves, the writings of Plato and Aristotle's everlasting  19   from ancient times.     His  20   request was for me to never forget what he taught me.     I haven't. (     )1. A. assistant   (     )2. A. tired       (     )3. A. agree       (     )4. A.  books      (     )5. A. demands     (     )6. A.  scold      (     )7. A. read        (     )8. A. bet         (     )9. A. hope        (     )10. A. enjoyment  (     )11. A. wealthiest (     )12. A. died away  (     )13. A. looking    (     )14. A. which      (     )15. A. read       (     )16. A. get        (     )17. A. shook      (     )18. A. bought     (     )19. A. artists    (     )20. A. greeting   B. dropout       B. old           B. remain        B. stories       B. speeches      B. remind        B. judge         B. hope          B. guess         B. shock         B. healthiest    B. went out      B. insisting     B. that          B. write         B. run           B. checked       B. pulled        B. classics      B. strict         C. waiter       C. familiar     C. share        C. novels       C. lectures     C. teach        C. open         C. wish         C. did          C. pleasure     C. happiest     C. passed away  C. depending    C. where        C. recite       C. take         C. examined     C. lent         C. treasure     C. supportive   D. dealer        D. young         D. talk          D. drinks        D. statements    D. confuse       D. start         D. decide        D. wanted        D. surprise      D. strongest     D. gave out      D. reflecting    D. them          D. recognize     D. work          D. grabbed       D. sold          D. words         D. parting