在QuidwayS系列以太网交换机上配置trunk端口类型的命令正确的是()
A. [Quidway-Ethernet0/1] port link-type trunk
B. [Quidway] port link-type trunk
C. [Quidway-Ethernet0/1] port trunk permit vlan all
D. [Quidway-Ethernet0/1] port trunk pvid vlan_id
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SEM的英文全称是()
A. Search Engine Marketing
B. Search Engine Optimization
C. Search Engine Tarketing
D. Search Engine Darketing
以下那些不是CTR全称的有()
A. Click Through Blue
B. Click Through Rate
Click Through Yellow
D. Click Through Green
幅度调制AM采用包络检波是因为其抗噪声性能最好()
A. T
B. N