76． (1) is a channel’s capacity which dire

根据《促进中部地区崛起规划》，到2015年，中部地区经济总量占全国的比重进一步提高，人均地区生产总值力争达到全国平均水平，城镇化率提高到（）。

A.40%

B.45%

C.48%

D.50%

人类创造的宏观尺度最大的一种城市化空间是（）

A.大都市区

B.大都市带

C.全球城市地带

D.全球城市区域

率先提出李白两入长安的学者是（）。

A.郁贤皓

B.黄锡圭

C.李从军

D.稗山

定向能武器一般可以分为战略和（）两种。

A.战略

B.战争

C.战术

D.学术

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.

1（）

A．interval

B．time

C．slot

D．delay