按要求写出下列各词。

1. fog (形容词)    _______

2. sun (形容词)    _______

3. heavy (副词)    _______

4. there (同音词)  _______

5. low (反义词)    _______

6. good (比较级)  _______

7. worst (反义词) _______

8. hard (反义词)   _______

9. hope (形容词)  _______

10. foot (复数)     _______

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 (61) between sending the notification and notification arriving at the source, thousands of additional (62) may arrive. In ATM network, a major tool for preventing (63) is (64) control. When a host wants a new virtual (65) , it must describe the traffic to be offered and the service expected.

A．interval

B．time

C．slot

D．delay