What are some characteristics of the typical VLAN arrangement?（）
A. VLANs logically divide a switch into multiple, independent switches at Layer 2.
B. Trunk links can carry traffic for multiple VLANs.
C. VLAN implementation significantly increases traffic due to added trunking information.
D. A VLAN can span multiple switches.
E. VLANs extend the collision domain to include multiple switches.
F. VLANs typically decrease the number of multiple switches.
Can we change the location for the tung-oil（）that for the gum rosin?
A. by
B. for
C. into
D. with
避雷网由不大于3m×3m的方形网络构成，每隔3m与避雷带焊接连通。（）
A. 正确
B. 错误
成本性态可分假设是指一切成本都可以按其性态划分为固定成本和变动成本，两类成本的划分是绝对的。
A. 正确
B. 错误
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