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  3. Resources Resources are found in nature. They make a better quality of life for humans. Soil, air, water, sunlight and trees

Resources Resources are found in nature. They make a better quality of life for humans. Soil, air, water, sunlight and trees

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问题                                                         Resources
    Resources are found in nature. They make a better quality of life for humans. Soil, air, water, sunlight and trees are all examples of resources that humans use every day, whether they know it or not.【B1】________
    A natural resource is a material found in nature and used by living things. Air, rocks, metals, oil and salt are all natural resources. Renewable (可再生的) resources are resources that can be replaced.【B2】________Trees that are cut down can be replaced quickly when seeds or baby trees are planted.     Water from our bathtubs (浴盆) can be cleaned for use. Plants, wind and rain can help clean the an to make it safe to breathe even if it comes out of a car or a factory.
    Sometimes resources cannot be replaced after they are used.【B3】________Once nonrenewable resources are all used up, nature will not be able to replace them. Oil, natural gas, soil and metals are all examples of nonrenewable resources.
    Coal is another example of a nonrenewable resource. 【B4】________ Humans mine the coal underground and use it as an energy source. Once humans have mined all the coal from inside Earth, there will be no more for us to depend on.【B5】________For example, wind and water turbines (涡轮机)  are now being used to produce energy.
A.  These are called nonrenewable resources.
B.  They replace some of the need to burn coal.
C.  It is made by nature deep in Earth.
D.  Without resources, humans could not live on Earth.
E.  Trees, air, water and energy from the sun are renewable resources.
F.  Luckily, humans are finding new ways to replace coal.
【B3】
选项
答案A
解析 空格后一句讲述的是不可再生资源的情况：A项讲的是什么是不可再生资源，与下文衔接最紧密，故选A。
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