根据下列装置图，回答有关问题：
（1）实验室制取CO2时，从长颈漏斗中加入的试剂名称是______；用装置A还可制取______（填一种气体即可）．
（2）收集CO2的装置是______．
（3）如图E所示，向烧杯中倾倒二氧化碳，下层蜡烛先熄灭，上层蜡烛后熄灭，说明二氧化碳具有的性质是______且密度比空气的大，因此，二氧化碳可用于______．
（1）实验室制取二氧化碳用大理石和稀盐酸，稀盐酸从长颈漏斗中加入，装置A是固体与液体常温下反应制取气体的装置，实验室中双氧水制氧气、锌粒与稀硫酸制氢气都可用此装置；
（2）二氧化碳密度比空气大，能溶于水，故只能用向上排空气法收集．
（3）烧杯中倾倒二氧化碳，下层蜡烛先熄灭，上层蜡烛后熄灭，说明二氧化碳不燃烧不支持燃烧，密度比空气大，因此二氧化碳可用来灭火．
故答案为（1）稀盐酸； O2．
（2）B．
（3）CO2不燃烧，也不支持燃烧 灭火．
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| A cold is a common (普通的) illness. It often starts with a sore __1__. You sneeze (打喷嚏) and your nose runs. You usually __2__ a headache, too. It's not a serious illness, but you can feel very __3__. What should you do when you have a cold? You should have a good __4__. It is good to drink a lot of water, too. You can __5__ and take some medicine. Maybe you can try some Chinese medicine. Chinese medicine is now very __6__all over the world. What should we do to keep from catching a cold (预防感冒)? One important rule is to __7__ often. Running, swimming or even walking can help a lot. Try to do it for 30 minutes a day, three or four times a __8__. Then go to bed before you are tired. Going to bed at the same time and getting up at the same time are also important. Studies show that the cold or flu virus (流感病毒) can live on our hands for long. So you should wash your __9__ often with soap. Finally, it's important to have a healthy lifestyle, and it's important to eat a balanced diet. If you can do those, you will __10__catch a cold again. | |||
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