题目内容：
反光标志的反光材料，嵌入度应大于（ ）。
A．20% B．30%
C．50%
D．80%
参考答案：
答案解析：
单选题：反光标志的反光材料，嵌入度应大于（ ）。
- 题目分类：民航机场工程
- 题目类型：单选题
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B．30%
C．50%
D．80%
B．30%
C．50%
D．80%
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