题目

以下九种物质是初中常见的物质,其中A为暗紫色固体,B、Y为黑色固体,X、E是组成元素相同的液体,C能使带火星的木条复燃,F能使澄清石灰水变浑浊。其中箭号表示生成的意思,试回答下列有关问题。(1)A的化学式为_______, X的化学式_________。(2)写出①的化学符号表达式______________________________(3)反应③属于的反应类型是______。I lived in Dallas, Texas nearly all my life with my mom, dad and older sister. We were    1   to respect others, value education, and get all that we could out of life. My parents always say, “  2   hard and the world is yours.” They are never without a   3  word of advice or a bit of encouragement when life gets tough. My parents always   4  me to go to college. However, when I   5  at 16 years old that I’d rather get married to a man than go to college, they  6  stopped telling me they loved me and I could do anything I wanted to.   7  , they persuaded me. I graduated from high school and currently   8  the University of Oklahoma studying medicine. I want to make the   9  a better place to live in. Every time I call home to tell them about a   10  I received in Chemistry Lab or Microeconomics or   11  class it is that I’m working hardest for at the moment, they tell me how   12  of me they are. I know there are college kids out there that have no one to call home to when they get an “A” on a project and I feel incredibly   13  to have my parents. Don’t get me wrong: We’ve had our share of   14  . I was the angry teenager and they were the awful   15  that wouldn’t let me stay out all night or let me get my tongue pierced. But somehow, we   16 to work through those issues. They never  17   loving in me or believing in me. I   18   everything I am to my parents. Without their constant love and     19  , I wouldn’t believe I can change the world. My parents taught me to always      20  for what I believe in. So I’m working toward something really great and can only hope I continue to make them proud. 1. A. brought        B. introduced     C. raised            D. produced 2. A. Educate        B. Work        C. Train            D. Practise 3. A. helpful         B. harmful       C. stressful          D. meaningful 4. A. reminded       B. expected      C. supposed         D. designed 5. A. hesitated    B. judged        C. fixed            D. decided 6. A. never          B. ever         C. seldom           D. hardly 7. A. Carefully    B. Hopefully      C. Thankfully        D. Delightfully 8. A. serve          B. attend        C. admit            D. join 9. A. fortune         B. planet        C. universe          D. world 10. A. grade         B. problem       C. failure           D. value 11. A. whenever      B. wherever      C. whichever        D. however 12. A. modest        B. proud          C. ashamed          D. nervous 13. A. annoyed         B. praised       C. relaxed           D. blessed 14. A. lessons        B. problems      C. moments         D. experiences 15. A. teachers           B. directors      C. couples          D. parents 16. A. managed       B. attempted     C. succeeded        D. conducted 17. A. concluded      B. began        C. prevented         D. stopped 18. A. pay           B. owe         C. own             D. spend 19. A. agreement      B. excitement     C. encouragement     D. statement 20. A. fight          B. look         C. defend              D. protect
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