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问题 单项选择题

男，46岁。近5年来，每年冬天有咳嗽、气喘发作。近4天来又有类似发作，不发热。此病例的胸部听诊可闻及何种异常（）

A.支气管肺泡呼吸音

B.支气管呼吸音

C.呼气性哮鸣音

D.吸气性哮鸣音

E.支气管肺泡呼吸音+湿啰音

答案

参考答案：C

单项选择题

结核性脑膜炎时，脑脊液中糖和氯化物的典型变化是（）

A.均升高

B.糖下降，氯化物升高

C.均下降

D.糖升高，氯化物下降

E.氯化物降低，糖正常
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单项选择题

One of the most widely used routing protocols in IP networks is the Routing Information Protocol(RIP)．RIP is the canonical example of a routing protocol built on the (71) algorithm．Routing protocols in internetworks differ slightly from the idealized graph model．In aninternetwork，the goal of the routers to forward packets to various (72) ．
Routers running RIP send their advertisement about cost every (73) seconds．A router also sends an update message whenever an update from another router causes it to change itsrouting table．
It is possible to use a range of different metrics or costs for the links in a routing protocol．RIP takes the simplest approach，with all link costs being equal (74) Thus it always tries tofind the minimum hop route．Valid distances are 1 through (75) ．This also limits RIP torunning on fairly small networks．

A．1
B．15
C．16
D．length of the link
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