题目

侯德榜是我国杰出的化学家，由他创立的“侯氏制碱法”中有这样一个反应：2NaHCO3 Na2CO3＋H2O＋x ， 则x的化学式是（） A . CO B . CO2 C . H2 D . CH4 答案：B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，并在答题卡上将该项涂黑。I was 14 years old. I was angry and rebellious, with_________ regard for anything my parents had to say, _________if it had nothing to do with me. Like so many _________, I struggled to escape from anything that didn’t _________ my picture of the world. As a “ brilliant without need of guidance” kid, I rejected any obvious _________ of love. In fact, I got angry at the _________ of the word “love”. One _________ , after an extremely difficult day, I_________ into my room, shut the door loudly and fell down onto my bed heavily. As I lay down in the privacy of my _________ , my hands placed under my pillow. There was an envelope. I pulled it out and on the envelope it said, “To _________ when you’re alone.”_________ I was alone, no one would know whether I read it or not. So I opened it. It said，“Mike，I know life is _________ right now, I know you are frustrated and I know we don’t do everything right. I also know that I love you _________ and nothing you do or say will ever change that. I am here for you if you ever need to talk. If you don’t, that’s also _________ . Just know that no matter where you go or whatever you do in your life, I will always love you and be _________ that you are my son. I’m here for you and I love you-that will never _________ .Love you, Mom.”Every night as I went to bed, I would put my hands under my _________ and I remember the _ _________ I felt every time I got a letter. During my teen years, the letters were the calm assurance that I still could be loved _________ my anger and rudeness. Just before I fell _________ I became grateful that my mom knew what I, an angry teenager, needed.1.A. little B. all C. full D. high2.A. seldom B. sometimes C. currently D. particularly3.A. families B. adults C. people D. teenagers4.A. hang up B. lift up C. agree with D. deal with5.A. attempt B. offer C. request D. advice6.A. risk B. proposal C. mention D. point7.A. night B. day C. morning D. afternoon8.A. slipped B. stormed C. sank D. slid9.A. bed B. floor C. closet D. chair10.A. answer B. seal C. read D. tear11.A. If B. When C. Though D. Since12.A. serious B. awful C. amazing D. exciting13.A. entirely B. gently C. heavily D. personally14.A. impossible B. terrible C. right D. okay15.A. nervous B. sorry C. proud D. sure16.A. last B. change C. happened D. start17.A. pillow B. book C. desk D. door18.A. relaxation B. sadness C. relief D. thrill19.A. in spite of B. instead of C. ahead of D. in need of20.A. ill B. down C. silent D. asleep