题目

I’ve loved my mother’s desk since I was just tall enough to sit above the top of it. 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 a 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 said again, “is for Elizabeth.” I never saw her angry, never saw her cry. I knew she loved me; she showed in action. But as a young girl, I wanted to have heart-to-heart talks between mother and daught下列说法中正确的是A.马德堡半球实验可以直接测出大气压的值B.用吸管把瓶中的汽水吸到嘴里，利用的是大气压强C.切肉前先磨刀，是为了在压力相同时减小受力面积，减小压强D.高压锅是利用增大压强降低沸点的原理尽快煮熟食物的