交通运输不仅与我们的生活息息相关，而且对地区经济的发展起着极其重要的作用，因此在生产生活中我们 要学会选择合适的交通运输方式。根据图中信息，判断正误，对的打“√”， 错的打“×”。

①当两地距离小于80千米，与运输量多少关系不大，一般选择公路运输。  ____

②当运输量较大，两地距离在80千米~550千米，可以选择铁路运输。____

③空运、水运、铁路运输和公路运输比较，总运价最高的是空运，最低的是公路。____

④有一批大宗货物要由焦作运往南宁，选择铁路运输。____

    Why do we need to throw less away? There are two reasons. One is that some resources（资源）are nonrenewable（不可再生的）. That means there is only a certain amount of that resource in the world. One example of these resources is oil. When we use up all the oil in the world, there will be no more.
    There is a second reason for throwing less away. All of our trash has to be put somewhere. Often, it is put into garbage dumps（垃圾场）. Much of that trash will be there for hundreds of years. The dumps ill be filled up with all this trash.
    There are three ways to cut down on trash.
    One way is to recycle. When you recycle something, it means it is made into another shape and used again. Old newspapers may become paper bags. A glassware can be melted（熔化）and made into a bottle.
    Another way to cut down on trash is to reuse things. You can wash and use a bottle again that can hold mustard（芥末酱）or something else.
The third way to cut down on trash is to reduce the amount of trash you make, for example, stopping buying things that you don’t need in the first place. That reduces the amount of the earth's resources.
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