Which three are characteristics of IPv6?()
An IPv6 address is 128 bits long.
B. An IPv6 header contains the header checksum field.
C. An IPv6 header is 20 bits long.
D. An IPv6 header contains the next header field.
E. IPv6 route rs send RA messages.
F. An IPv6 header contains the protocol field.
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下列不属于物理力学性能检验的是()
A. 抗拉强度
B. 含水量
C. 安定性
D. 抗腐蚀性
测量方法有:同标称值传递法和过渡()法
A. 测量法
B. 差值法
C. 传递法
D. 等效法