本题目来源于试卷: Soil Structure & Systems，类别为 IB环境系统与社会
[单选题]
Figure: Typical soil c b+ 2f uhn*i5gdxgy92hb kugs;* zi9w (f01n1k,iyukprofile diagram
In the figure, identify what the top or “O” layer is often referred to as:
A. The Outer Layer
B. The Oxygen Layer
C. The Organic Layer
D. The Zero layer
参考答案: C
本题详细解析:
The top thin layer is referred to as the “Organic” layer, so option u3 q;c3syki): 4q,ydkeb, egeC is the correct che qegkiyqdeku );3, 4b, ys3:coice.
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