Many Chinese people have a good time during the Chinese New Year. It usually comes in January or February. Each year gets a name. It may be called the year of the dog or the year of the tiger instead of (代替)2006 or 2010. Usually there is dragon(龙)dance in the street. The dragon is a strange(奇怪的)animal about 20 feet(英尺)long. It is made of paper and cloth(布). Men hide(藏)under the dragon, and make a lot of noises by shouting and laughin9. There are always a lot of fireworks(烟火). After the dragon dance, the children sing and dance in the street.

能支持动物呼吸的一种单质 ____   。