以下（）探测器是利用线缆电信号来传输的探测报警器。
A.数字传输方式
B.有线传输方式
C.数码传输方式
D.模拟传输方式
参考答案：B
髀骨
To a router, a flow is a (1) of packets that share the same Characterstics, such as traveling the same (2) ,using the same (3) ,having the same kind of security, and so on. A router that supports the handling of flow labels has a (4) table. The table has an entry for each active flow label; each entry defines the (5) required by the corresponding flow label.
2（）
A．path
B．rout
C．circuit
D．way
