题目

铁的冶炼和探究 取24.0gFe2O3粉末，小组同学用下图装置模拟炼铁，并测定反应后固体成分。 资料：碱石灰可吸收H2O和CO2。 (1)连接装置，先_______，再装入药品。 (2)实验时先通入CO，目的是_______。 (3)控制A中温度在700℃至固体全部变黑，继续通CO至冷却。 ①通过测定装置B中固体的质量变化，可准确求得装置A中剩余固体质量。装置C的作用是____。 ②现直接测得装置A中剩余固体质量为19.2g。则装置B中固体应增重_______g。 (4)经分析A中剩余固体19.2g为Fe和FexOy5、I’ve loved my mother’s desk since I was just tall enough to see above the top of it as Mother sat writing letters. Standing by her chair, looking at the ink bottle, pens, and white paper, I decided that the act of writing must be the most wonderful thing in the world. Years later, during her final illness, Mother kept different things for my sister and brother. “But the desk,” she’d said again, “is for Elizabeth.” I never saw her angry, never saw her cry. I knew she loved me. She showed it in action. But as a young girl, I wanted heart-to-heart talks between mother and daughter. They never happened. And a gulf opened between us. I was “too emotional(易动感情的)”， but she lived “on the surface”. As years passed and I had my own family, I loved my mother and thanked her for our happy family. I wrote to her in careful words and asked her to let me know in any way she chose that she did forgive(宽恕) me. I posted the letter and waited for her answer. None came. My hope turned to disappointment then little interest and, finally, peace―it seemed that nothing happened. I could not be sure that the letter had even got to Mother. I only knew that I had written it, and I could stop trying to make her into someone she was not. Now the present of her desk told me, as she’d never been able to, that she was pleased that writing was my chosen work. I cleaned the desk carefully and found some papers inside―a photo of my father and a one-page letter, folded and refolded many times. Give me an answer, my letter asks, in any way you choose. Mother, you always chose the act that speaks louder than words. 68. The writer began to love her mother’s desk _____________. A. after Mother died            B. before she became a writer C. when she was a child      D. when Mother gave it to her 69. The passage shows that_____________ . A. Mother was cold on the surface but kind in her heart to her daughter B. Mother was very serious about everything her daughter had done C. Mother cared much about her daughter in words D. Mother wrote to her daughter in careful words 70 The word “gulf”means ____________. A. deep understanding between the old and the young B. difficult ideas between the mother and the daughter C. free talks between the mother and the daughter D. part of the sea going far in land 71. What did Mother with her daughter’s letter asking for forgiveness? A. She had never received the letter. B. For years, she often talked about the letter. C. She didn’t  forgive her daughter at all in all her life. D. She read the letter again and again before she died. 72. What’s the best title(题目) of the passage? A. My Letter to Mother            B. Mother and Children C. My Mother’s Desk            D. Talks Between Mother and Me