阅读材料，回答问题。

【共享·与单车相遇】近来，共享单车因绿色节能、方便智能等特点迅速走红·但同时，混乱停放，私自加锁、损毁单车等行为正成为共享单车的“成长之困”。

【共事与区域相约】2017年3月，国务院公布《东北地区与东部地区部分省市对口合作方案》，明确了吉林省与浙江省的对口合作关系。

    【共享与世界相拥】2013年中国提出建设“一带一路”合作倡议，如今，已有100多个国家和国际组织  积极响应，40多个国家与中国签署合作协议。2016年中国与沿线国家进出口总额达6．3万亿元，对沿线  20多个国家累计投资185亿美元，为东道国创造了近11亿美元的税收和18万个就业岗位。

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    Many animals hide to stay alive. They hide in many ways. Some animals hide in leaves; some animals hide in snow. Usually their colors or shapes help protect them. It's hard to see an Arctic bear in snow. Its white fur helps protect it. Chameleons(变色龙) can hide by changing colors. Their skin turns the same color as what is around them. Some chameleons can change colors in five minutes.

    Many animals try to look bigger than they are to stay alive. Some animals can make other animals think they are very big. If they look very big, animals that are looking for food will run away. Bears can walk on two legs. They look very, very scary. Some animals will run away from them.

Many animals try to stay around other animals. This helps them stay alive. Zebras stay close together so that they can help each other look out of danger. Seeing many stripes at once can also confuse animals that want to eat them. Some birds stay in a circle, each toward a different direction. In this way they can also help each other stay alive by looking around for animals that many want to eat one of them.