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问题 单项选择题 A1型题

医师是指依法取得执业医师资格或执业助理医师资格，经注册在医疗机构从事（）工作的人员。

A.医学物理工程

B.护理

C.医疗器械检验

D.医疗

E.药学

答案

参考答案：D

多项选择题

临床常用的治疗尿路感染的抗生素有()

A．磺胺类如复方新诺明片

B．氟喹酮类如氧氟沙星

C．青霉素类如氨苄西林

D．头孢菌素类

E．氨基糖苷类
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单项选择题

The network layer provides services to the transport layer. It can be based on either___20___. In both cases, its main job is ___21___ packets from the source to the destination.

In network layer, subnets can easily become congested, ncreasing the delay and ___22___ for packets. Network designers attempt to avoid congestion by proper design. Techniques include___23___ policy, caching, flow control, 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___24___, and admission control. Approaches that have been designed for good quality of service include integrated services (including RSVP), differentiated services, and MPLS.

20（）

A. virtual circuits or datagrams

B. TCP or UDP

C. TCP or IP

D. IP or ARP
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