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问题 单项选择题

（）老师是中国第一位在国际比赛中获奖的钢琴家，同时也是中国在国际乐坛中最具影响和权威的钢琴演奏家、教育家，她被誉为“中国钢琴教育的灵魂”。

A.周广仁

B.傅聪

C.郎朗

D.李云迪

答案

参考答案：A

解答题

□÷6=34…△中，△最大是______，这时□是______．
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单项选择题

For（1） service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new （2） for every packet sent. Instead,when a connection is established, a route from the （3）machine to the destination machine ischosen as part of the connection setup and stored in tables inside the（4）That route is used forall traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-orientedservice, each packet carries an （5）telling which virtual circuit it belongs to.

（5）是（）

A.address

B.identifier

C.interface

D.element
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