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问题 选择题

He was wearing dark glasses to _____ his eyes from the sun. [ ]

A. stop

B. keep

C. prevent

D. protect

答案

答案：D

单项选择题

下列不属于公共秩序管理工作范畴的是( )。

A．码头
B．体育场所
C．风景区
D．军队营区
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单项选择题

Flow control is a function that prevents network congestion by ensuring that (1) do not overwhelm (2) with data. There are three commonly used methods for handling network congestion. (3) is used by network devices to temporarily store bursts of excess data in memory until they can be processed. (4) are used by receiving devices to help prevent their buffers from overflowing. (5) is a flow -control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted.

3（）

A．Buffer

B．Source-quench messages

C．Buffering

D．Windowing
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