题目

有等体积、等pH的Ba(OH)2、KOH和NH3·H2O三种碱溶液，滴加等浓度的盐酸将它们恰好中和，用去酸的体积分别为V1、V2、V3，则三者的大小关系正确的是(      ) A.V3＞V2＞V1          B.V3=V2=V1           C.V3＞V2=V1         D.V1=V2＞V3 答案：CSandra usually gets up at six in the morning. She usually has breakfast at six thirty. She goes to school at around seven o’clock. School starts at seven thirty.Sandra learns many subjects at school: math, English, science, history, art, music and PE. Her favorite subject is music. It’s relaxing, and the music teacher is fun. Sandra has four classes in the morning. At eleven forty she comes home for lunch. She has lunch with her grandmother. In the afternoon, she isn’t very busy. She has only two classes. After school she does her homework and plays with other kids.In the evening, Sandra’s parents come home from work at five o’clock. The family have dinner at six. After that they usually listen to music or watch TV. Sandra goes to bed at nine thirty. Her grandmother goes to bed at nine, and her parents go to bed at around ten o’clock.1.Sandra goes to school at __________.A.6:00B.6:30C.7:00D.7:302.Sandra’s favorite subject is __________.A.mathB.musicC.historyD.art3.Sandra has___________ classes every day.A.fourB.sixC.sevenD.eight4.Sandra usually does homework _________.A.after dinnerB.in the morningC.before breakfastD.in the afternoon5.The family don’t __________ in the evening.A.play chessB.watch TVC.go to bedD.listen to music