单选题A smoke _____ system provides families with early warning of fire.AcollectionBrepressionCdetectionDresonance
单选题
A smoke _____ system provides families with early warning of fire.
A
collection
B
repression
C
detection
D
resonance
参考解析
解析：
detection检测。collection采集。repression抑制。resonance回声，共鸣。
detection检测。collection采集。repression抑制。resonance回声，共鸣。
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