题目内容：
道路石油沥青的等级分为（ ）。
A．一级沥青 B．A级沥青
C．特级沥青
D．B级沥青
E．C级沥青
参考答案：
答案解析：
多选题：道路石油沥青的等级分为（ ）。
- 题目分类：公路工程
- 题目类型：多选题
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B．A级沥青
C．特级沥青
D．B级沥青
E．C级沥青
B．A级沥青
C．特级沥青
D．B级沥青
E．C级沥青
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