题目内容

若诊断为水疝,必须下列哪项支持:

A. 透光试验阴性
B. 触诊睾丸肿大压痛明显
C. 血象白细胞增高
D. 透光试验阳性
E. 血象白细胞正常

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案例分析题Electronic mail and filing permit a user to compose and transmit a message on an office ()system. In the early 1970s, the ARPANET community developed a number of such systems which have been heavily used. Through standard message format () , several hundred different computers and electronic mail interfaces are specification of how () and return addresses should appear on envelopes and which sizes are allowable for envelopes. In the electronic message world, they describe what () of characters are required at the () of a message to identify the sending and receiving mailboxes. the () of a message to identify the sending and receiving mailboxes.

A. end
B. last
C. initiation
D. beginning

(69) 实现传输线上的位流信号同步。

A. 物理层
B. 数据链路层
C. 网络层
D. 应用层

与线性流水线最大吞吐率有关的是 (62) 。

A. 各个子过程的执行时间
B. 最快子过程的执行时间
C. 最慢子过程的执行时间
D. 最后子过程的执行时间

下列网络互连设备中,工作在数据链路层的是 (53) 。

A. 交换机
B. 路由器
C. 网桥
D. 网关

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