单选题Wires that are installed in air returns above a ceiling must be（）A fire proofB fiberglass coatedC plenum ratedD teflon coated
题目
单选题
Wires that are installed in air returns above a ceiling must be（）
A
fire proof
B
fiberglass coated
C
plenum rated
D
teflon coated
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参考答案和解析
正确答案：
D
解析：
暂无解析