问题
问答题 简答题
用奥氏仪做分析为什么顺序不能颠倒？
答案
参考答案：因为焦钾是碱性液，既可以吸收O2，又可以吸收酸性气体CO2而Cu2Cl2是具有还原性液，既可吸收CO，又可以吸收O2，所以顺序不能颠倒。
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用奥氏仪做分析为什么顺序不能颠倒？
参考答案：因为焦钾是碱性液，既可以吸收O2，又可以吸收酸性气体CO2而Cu2Cl2是具有还原性液，既可吸收CO，又可以吸收O2，所以顺序不能颠倒。
| I'll never forget the days when I camped (野营) with my classmates last summer. Early in the morning, 200 1 from the 4th grade gathered at the bus station. After saying goodbye to our parents, we stood in line to get on the buses. It was more than two hours 2 we arrived at the campground. We got off the buses cheerfully like birds flying out of their cages. Laughing and shouting, we jumped and ran all over the place. For us, it was our 3 time to be away from Dad and Mom. Some started feeling homesick(想家) even before dark. 4 as the night party and dances began, the homesickness was gone. The next day, everyone 5 to the boating class, hoping to be at the head of the others. At first, my friends and I worked hard, but the boat wouldn't listen to us and kept going 6 . Then the boating teacher taught us how to work together. After many tries, we did better. Swimming class was my favorite. It was about one o'clock, the 7 time of a day and the best time to stay in the cool water. The swimming teacher was an interesting man. During the class he often made us 8 happily. A week 9 before we knew it. During the week I learned many new things and made many new friends. I also learned to take care of myself 10 parents around me. | |||
| ( )1. A. children ( )2. A. until ( )3. A. last ( )4. A. But ( )5. A. walked ( )6. A. round and round ( )7. A. coldest ( )8. A. smile ( )9. A. pass ( )10. A. without | B. teacher B. when B. next B. So B. swam B. on and B. coolest B. laugh B. passes B. with | C. comrades C. before C. first C. Or C. rushed C. front and front C. warmest C. cry C. past C. instead | D. young men D. after D. third D. If D. called D. back and back D. hottest D. call D. passed D. by |