暗管敷设时,埋入地下的钢管壁厚不能小于(),并要刷防锈漆。
A. 1mm
B. 1.5mm
C. 2mm
D. 3mm
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Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13.An 802.1Q trunk is configured between the two switches.On CAT1,VLAN10 is chosen as native,but on CAT2 the native VLAN is not specified.What will happen in this scenario?()
A. 802.1Q giants frames could saturate the link.
B. VLAN10 on CAT1 and VLAN1 on CAT2 will send untagged frames.
C. A native VLAN mismatch error message will appear.
D. VLAN10 on CAT1 and VLAN1 on CAT2 will send tagged frames.
给婴儿洗澡要坚持()
A. 夏天二天一次。冬天一周一次
B. 夏天要天天洗,冬天每星期洗2---3次
C. 冬天也要天天洗
D. 视情况而定