Which statement about IPv6 is true?()
Addresses are not hierarchical and are assigned at random.
B. Only one IPv6 address can exist on a given interface.
C. There are 2.7 billion addresses available.
D. Broadcasts have been eliminated and replaced with multicasts.
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应变部署表由三副与开航后根据大副的意图编制。
A. 正确
B. 错误
水泵的吸上高度越大,水泵的入口真空越高。
A. 正确
B. 错误
下面列举的内容不属于教学技术手段的是()
A. 录象.多媒体
B. 录音.录象.VCD
C. 板书.演示实物.演示实验
D. 标本.模型.图表.录象.课件