在建工程(含脚手架是)的外侧边缘与外电架空边线之间必须保持安全操作距离为外电线路电压在1―10KV时,最小安全操作距离就不小于()
A. 4m
B. 6m
C. 8m
D. 10m
E. 15m
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从事生产、经营的纳税人,税务登记内容发生变化的,自工商行政管理机关办理变更登记之日起30日内,持有关证件向税务机关申报办理变更税务登记。
A. 正确
B. 错误
What statements are true regarding ICMP packets?()
A. They acknowledge receipt of TCP segments.
B. They guarantee datagram delivery.
C. They can provide hosts with information about network problems.
D. They are encapsulated within IP datagrams.
E. They are encapsulated within UDP datagrams.