回填土应在市内高出路由（）厘米，郊区可高出路由（）厘米。
参考答案：5-10；15-20
---What’s the ______of the animal? Can you describe it to me?
---Of course. It is smart and likes eating bananas.
A．shape
B．color
C．feature
D．size
纤维分解菌 cellulose-decomposing bacteria
