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问题 多项选择题

在综合接入中，用于提供语音业务的设备有（）

A、烽火B2101-E1TX8V-S-220

B、烽火OL100C-02B-48

C、华为60A

D、D-Link808HV

E、烽火R2001-220

F、高科V2060

答案

参考答案：A, C, F

选择题

某中学生长期不吃早餐，并用省下的钱割了双眼皮。对此，下列看法正确的是[ ]

A．爱美之心人皆有之，此举是应提倡的 

B．自己认为值得就做，让别人去说吧 

C．这种过分追求外表美的做法是虚荣的表现 

D．美丽的外表是获得自尊的必备条件 
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单项选择题

In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (1) between sending the notification and notification arriving at the source, thousands of additional (2) may arrive. In ATM network, a major tool for preventing (3) is (4) control. When a host wants a new virtual (5) ,it must describe the traffic to be offered and the service expected.

5（）

A．path

B．rout

C．circuit

D．way
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