TZX2B磁场削弱电阻及劈相机启动电阻检查中,用钢板尺测量电气间隙应为()。
A. 14mm
B. 16mm
C. 18mm
D. 20mm
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阅读中要注意施工图上标注的(),是否图形相同而含义不一致。
A. 设备材料表
B. 尺寸图例
C. 标题栏
D. 图例符号
防水涂膜施工中,需铺设胎体增强材料时,屋面坡度小于()时可平行屋脊铺设。
A. 10%
B. 15%
C. 20%
D. 25%
When a new trunk link is configured on an IOS based switch, which VLANs are allowed over the link?()
All defined VLANs are allowed on the trunk by default.
B. Each VLAN, or VLAN range, that is specified with the switchport mode command.
C. Each VLAN, or VLAN range, that is specified with the vtp domain command.
D. Each VLAN, or VLAN range, that is specified with the vlan database command.
设桩距为S,桩径为d,则摩擦桩群桩承载力等于单桩承载力之和的条件是()。
A. S>3d
B. S≥6d
C. S≤6d
D. S>d