题目内容：
光纤传感器一般由三部分组成，除光纤之外，还必须有光源和（）两个重要部件。
A.反射镜
B.透镜
C.光栅
D.光探测器
参考答案：
选择题：光纤传感器一般由三部分组成，除光纤之外，还必须有光源和（）两个重要部件。
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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