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问题 选择题

人体的呼吸系统由呼吸道和肺两部分组成。下图是人体呼吸系统模式图，图中⑥肺可以

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A．过滤、温暖和湿润空气

B．分泌黏液和作为气体通道

C．进行气体交换，使血液由动脉血变为静脉血

D．使血液中氧气含量增多，二氧化碳含量减少

答案

答案：D

单项选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.
(71) is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.
(72) is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.
(73) functions with two layers of protocols. It can connect networks of different, speeds and can be adapted to an environment as it expands.

A. FDDI B. ATM C. Ethernet D. SMDS

A socket is composed of two addresses: (74) .Heterogeneous network environments consist of computer systems from (75) vendors that run different operating systems and communication protocols.
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单项选择题

多根多处肋骨骨折急救要点主要是

A．输血补液，防治休克

B．控制反常呼吸，保持呼吸道通畅

C．立即行开胸探查术

D．加压给养

E．镇静，镇痛
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