题目内容：
路堑坡面垂直绿化国内外不常使用的方式是( )。
A.机械喷播绿化
B.人工沟
C.挖穴绿化
D.机械散播绿化
参考答案：
选择题：路堑坡面垂直绿化国内外不常使用的方式是( )。
- 题目分类：二级造价工程师
- 题目类型：选择题
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