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问题 选择题

高尔基说：“天才就是劳动。人的天赋就像火花，它既可能熄灭，也可能燃烧起来，而使它成为熊熊烈火的办法，只有一个，那就是劳动、再劳动。”这句话是说[ ]

A．只有在实践中才能激发潜能

B．科学家、伟人、名人的劳动是特殊的劳动

C．天才具有智慧的火花

D．只要努力劳动，就会成为天才

答案

答案：A

单项选择题

The network layer provides services to the transport layer．It can be based on either (71) ．In both cases，its main job is (72) packets from the source to the destination．

In network layer，subnets can easily become congested，increasing the delay and (73) .

for packets．Network designers attempt to avoid congestion by proper design．Techniques include (74) policy，caching，flowcontrol，and more．

The next step beyond just dealing with congestion is to actually try to achieve a promised quality of service．The methods that can be used for this include buffering at the client，traffic shaping，resource (75) ，and admission control．Approaches that have been designed for good quality of service include integrated services(including RSVP) ，differentiated services， and MPLS．

（73）处填（）。

A．lowering the throughput

B．lowering the correctness

C．lowering the effectiveness

D．lowering the preciseness
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问答题

何谓卫、气、营、血的病位顺传其临床意义如何
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