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【单选题】
在OSI参考模型中,路由选择功能是在哪一层完成的:A.
传输层
B.
网络层
C.
数据链路层
D.
会话层
手机使用
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反馈参考答案：
举一反三
【简答题】The flood of women into the job market boosted economic growth and changed U.S. society in many ways. Many in-home jobs that used to be don_ 1 by women — ranging from family shopping to preparing meal...
【简答题】The flood of women into the job market boosted economic growth and changed U.S. society in many ways. Many in-home jobs that used to be don_ 1 by women — ranging from family shopping to preparing meal...
【简答题】The flood of women into the job market boosted economic growth and changed U.S. society in many ways. Many in-home jobs that used to be don_ 1 by women — ranging from family shopping to preparing meal...
【简答题】The flood of women into the job market boosted economic growth and changed U.S. society in many ways. Many in-home jobs that used to be don_ 1 by women — ranging from family shopping to preparing meal...
【单选题】下列塑料管道中，（ ）适用于给水管道（非饮用水）、排水管道、雨水管道。
A.
氯化聚氯乙烯（PVC-C）管
B.
硬聚氯乙烯（PVC-U）管
C.
无规共聚聚丙烯（PP-R）管
D.
丁烯（PB）管
【单选题】下列塑料管道中，（）适用于给水管道（非饮用水）、排水管道、雨水管道。
A.
氯化聚氯乙烯（PVC-C）管
B.
硬聚氯乙烯（PVC-U）管
C.
无规共聚聚丙烯（PP-R）管
D.
D.丁烯（P管
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