单选题：Soil that is rich in organic matters_______

题目分类：成人英语三级
题目类型：单选题
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题目内容：

Soil that is rich in organic matters_______ A．has had chemicals and fertilizers added to it
B．contains vegetable matter that has not been consumed
C．has been nourished by fertilizers
D．already contains large quantities of vitamins and minerals

参考答案：

答案解析：

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分类：成人英语三级题型：单选题