以下关于利用工业固体废物的说法，符合《固体废物污染环境防治法》的是( )。
A．企业应当对其产生的工业固体废物加以利用
B．未经环境保护行政主管部门批准，企业不得对其产生的工业固体废物加以利用
C．经环境保护行政主管部门批准并颁发许可证后，企业可对其产生的工业固体废物加以利用
D．企业应当根据经济、技术条件对其产生的工业固体废物加以利用
参考答案：D
Many animals use some kinds of language .They use signals (信号) and the signals have meaning , For example, When a bee has found some food , it goes 21 its home .It is 22 for a bee to tell 23 bees where the food is by speaking to 24 ,but it can do a little dancing .This tells the bees where the food is and 25 it is . Some animals show how they feel by making sounds . It is not difficult to tell that a dog barks (吠) 26 it is angry .Birds make several different sounds .and 27 has its own meaning . Sometimes we humans make sounds , 28 we make sounds like OH or OUCH to show we feel about something or when we 29 something on our feet. We humans have languages. We have words .These words have the meaning of things actions (行动)，feeling or ideas .We are able to give each other information by writing down words .in this way , we can 30 what has happened or send the messages to people far away.
C.In the same way D.By the different way
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