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【单选题】
（）适合独立住宅的管道引入使用，全截面防水、抗紫外线老化；防火阻燃、无毒无烟。
A.
单芯结构光缆
B.
分支光缆
C.
架空室内入户线光缆
D.
管道入户线光缆
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts (67) our protective blanket on (68) . Light gets through, ...
A.
from
B.
than
C.
as
D.
away