题目

下列各组物质不能发生化学反应的一组是（ ） A．铝和稀盐酸B．氢氧化钠溶液和硫酸铜溶液C．氯化钠溶液和硝酸银溶液D．硫酸钠溶液和氯化镁溶液 答案：分析：在金属活动性顺序中，位于氢前面的金属能置换出酸中的氢；根据复分解反应发生的条件，若两种物质相互交换成分有沉淀、气体或水生成，则能发生化学反应；据此进行分析判断． 解答：解：A、铝的金属活动性比氢强，能与稀盐酸反应生成氯化铝和氢气，故选项不符合题意． B、氢氧化钠溶 先通读下面短文，掌握其大意，然后从各小题所给四个选项中，选出一个最佳答案。         I am sitting in an empty football field after my last high school football game that finished a few hours ago. I'm the mid-field player on my team. But in fact that's not (1) now. I was the mid-field player because, as I said, this was my (2) game. That's a good way to end a high school football career (生涯), especially if you win, but even though you don't, it's (3) to leave at a high point.          I was eight when I first started playing football. My dad (4) football, and he used to practise with me at home — passing, catching, running. We used to practise almost every evening (5) it got too dark. He tried to teach everything he knew about the (6). "Just remember: don't ever (7)." "Stay in the game. Don't lose your concentration (专注).""Go out there and give 110 percent(百分之……)every time." Well, that was a long time ago, but I still hear his words (8) in my ears.          I had a lot on my mind (9) the game today. I don't like things to end, I guess, and this was the last game.I was talking to myself and warning myself about what to do and not to do. I didn't sleep at all (10), and whenthe sun came up this morning, I reached the point where (11) just wanted it all to be over, finished, done. But then when the game started, my mind became (12). I just lived in this game, this moment. I didn't hear the crowd, I didn't feel the cold or the pain, I never felt tired. I just kept my eyes on the (13), and it was just me and the ball and, inside, a soft, white light (14) me the way to, and it was a beautiful, empty feeling.         It's all over now, and it's really getting cold here. It's starting to snow. The sun's almost gone, and I can (15) see the goal. Now it's dark and I'm sitting here all alone. Well, I guess it's time to say good-bye and moveon.  (     )1. A. true    (     )2. A. first  (     )3. A. good    (     )4. A. needed  (     )5. A. until   (     )6. A. football (     )7. A. grow up (     )8. A. ringing  (     )9. A. from    (     )10. A. tonight (     )11. A. we      (     )12. A. empty   (     )13. A. way     (     )14. A. sending (     )15. A. already B. wrong        B. last      B. bad         B. hated        B. when        B. game       B. catch up     B. saying     B. before        B. yesterday B. they          B. full       B. field        B. teaching    B. hardly  C. strange       C. worst    C. lucky        C. missed      C. unless       C. goal        C. give up     C. falling    C. through        C. today     C. I            C. rough       C. ball         C. pointing    C. never   D. clear            D. favourite   D. painful         D. loved           D. although       D. score           D. hurry up        D. coming       D. after             D. last night  D. he               D. awake          D. match           D. showing       D. clearly