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问题 单项选择题

视觉失认病灶部位一般在枕叶副纹区与纹周围区，特别是优势大脑半球，支配血管为

A．大脑前动脉

B．大脑后动脉

C．大脑中动脉

D．大脑颞枕动脉

E．大脑顶枕动脉

答案

参考答案：B

单项选择题 A1型题

急性肾功能衰竭少尿期三天内病人的饮食要求为（）

A.高脂、高糖、高蛋白

B.高蛋白、高糖、多维生素

C.低蛋白、高脂、低维生素

D.低蛋白、低糖、多维生素

E.无蛋白、高糖、多维生素
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单项选择题

Serialization delay and (1) 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 (2) on the wire, and queuing delay (depth of the queue) are improved by increasing the (3) 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 (4) in bandwidth. If the circuits are not over-utilized, then increasing the bandwidth to improve the (5) of the application will only result in an increased bandwidth with no positive effects on performance.

（5）是（）

A.capability

B.cost

C.amount

D.performance
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