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问题 单项选择题

卧式镗床主参数代号是用( )折算值表示的。

A．机床的重量

B．工件的重量

C．主轴直径

D．加工最大棒料直径

答案

参考答案：C

解析：卧式镗床主参数代号是用主轴直径折算值表示的。

单项选择题

患者男，71岁，来院查体。糖尿病9年，高血压5年，蛋白尿2年。实验室检查：SCr175.5μmol/L，BUN11.6mmol/L，胆固醇6.7mmol/L；尿蛋白（+++），尿RBC（－）；24h尿蛋白定量2.6g。该患者最可能的诊断是（）

A.慢性肾炎

B.高血压所致良性肾小动脉硬化症

C.糖尿病肾病Ⅳ期

D.慢性肾病Ⅳ期

E.膜性肾病
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单项选择题

Serialization delay and（）delay are the two components of network delay that are improved by increasing bandwidth. Serialization delay, i.e. the amount of time it takes to put the（）on the wire, and queuing delay (depth of the queue) are improved by increasing the（）from a 128kbps circuit to a T1. However, three other components of delay, routing/switching delay, distance delay, and protocol delay are components that can not be positively affected by an （）in bandwidth. If the circuits are not over-utilized, then increasing the bandwidth to improve the（）of the application will only result in an increased bandwidth with no positive effects on performance.

and queuing delay (depth of the queue) are improved by increasing the（）from a 128kbps circuit to a T1.

A．memory

B．cache

C．bandwidth

D．delay
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