金属材料在生产生活中有广泛的用途，人类的生产生活离不开金属．
Welcome to Wenzhou Zoo! There are many different kinds of animals in the zoo．They come from different countries and they eat different food.
Beibei is a cute panda．She is five years old from China. She is black and white．She likes eating bamboo and drinking water．
Martin is a big elephant．He is ten years old with a long nose．He likes eating grass. People can teach* him to do much work to help them．
Dudu is a monkey. He is two years old from Japan．He likes eating bananas and cakes．He often lives in the trees．
Nick is a lion. He is strong．He is nine years old from England．He likes eating meat. He is very happy in the zoo．
阅读下面的诗歌，完成下列各题。
春望
【唐】杜甫
国破山河在，城春草木深。
感时花溅泪，恨别鸟惊心。
烽火连三月，家书抵万金。
白头搔更短，浑欲不胜簪。
某混和气体可能含有H2、CO、CO2、HCl、NH3和水蒸气中的两种或多种，当混和气体依次通过：①澄清石灰水（无浑浊现象）；②氢氧化钡溶液（有浑浊现象）；③浓H2SO4（无现象）；④灼热氧化铜（变红）；⑤无水硫酸铜（变蓝）．（假设每一次吸收均完全）．对该混和气体成分判断正确的是（ ）
下列不属于生物对外界做出反应的是( )
下图的标志中，是轴对称图形的有( )个。
