Which of the following are true of Ethernet technology?（）
A. Hosts use a logical ring topology.
B. Hosts use a logical bus topology
C. Hosts must wait for an electronic signal to transfer data.
D. Hosts are directly connected to a wiring concentrator called a MSA
查看答案
GPWS方式一计算中，当IRU的升降速率信号失效时（）
A. 方式一警告失效
B. GPWS使用气压高度速率
C. GPWS使用IRU失效前的升降速率信号
D. GPWS计算升降速率
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