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问题 单项选择题

李斯特认为，在五个经济发展阶段中，只有（）阶段国家应实行政策，其余阶段实行自由贸易政策。

A.原始未开化时期

B.畜牧时期

C.农业时期

D.农工业时期

答案

参考答案：D

单项选择题

In low-speed network，it is usually adequate to wait for congestion to occur and then react to it bytelling the source of packets to slow down．In high-speed networks，this approach often works poorly，because in the (71) between sending the notification and notification arriving at the source，thousands of additional (72) may arrive．In ATM network，a major tool for preventing (73) is (74) control．When a host wants a new virtual (75) ，it must describe the traffic to be offeredand the service expected．

（71）处填（）。

A．interval

B．time

C．slot

D．delay
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问答题 简答题

使用党员组织关系介绍信的方法有哪些？
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