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问题 单项选择题

依据《天津市残疾人保陣条例》，天津市行政区域内的机关、团体、企业事业单位和民办非企业单位应当按不低于单位在职职工总数（）的比例安排残疾人就业

A.百分之一点五

B.百分之二

C.百分之二点五

D.百分之三

答案

参考答案：A

单项选择题

A transport layer protocol usually has several responsibilities．One is to create a process-to-process communication；UDP uses (71) numbers to accomplish this．Another responsibility is to providecontrol mechanisms at the transport level．UDP does this task at a very minimal level．There is no flowcontrol mechanism and there is no (72) for received packet．UDP, however,does provide errorcontrol to some extent．If UDP detects an error in the received packet，it will silently drop it．
The transport layer also provides a connection mechanism for the processes．The (73) must be able to send streams of data to the transport layer．It is the responsibility of the transport layer at (74) station to make the connection with the receiver,chop the stream into transportable units，numberthem，and send them one by one．It is the responsibility of the transport layer at the receiving end to waituntil all the different units belonging to the same process have arrived，check and pass those that are (75) flee，and deliver them to the receiving process as a stream．

A．connection

B．window

C．acknowledgement

D．destination
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单项选择题

1998年在法国举行的世界杯足球赛开幕式上，有300名模特儿展示了法国著名服装设计大师伊夫·圣·洛朗的作品，其中有一位唯一的中国模特儿，请问她的名字是哪一个？（）

A、李欣

B、李冰

C、李芳

D、李艾
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