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问题：
[单选题]火灾探测器按探测火灾不同的理化现象分为（）
A、感烟;感温;感光;可燃气体探测器
B、光电感烟式;单源式;双源式;离子感烟式探测器
C、定温式;差定温式;紫外式;半导体型可燃气体探测器
D、点型探测器;线型探测器
参考答案：
A
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