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问题 单项选择题

男性，50岁，患高胆固醇血症3年，到医院检验科进行血脂复查，并就其检验结果和膳食问题咨询社区医生。

建议其每日膳食中胆固醇摄入量不要超过( )。

A．100mg
B．300mg
C．500mg
D．800mg
E．1000mg

答案

参考答案：B

解析：一个人每天的胆固醇摄入量不超过300mg的话，可以表现出降低胆固醇吸收的生物活性。

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 protocol delay are components that can not be positively affected by an（）in bandwidth.

A．increase

B．decrease

C．maintenance

D．extension
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单项选择题

一般来说，一个人对社会的贡献越大，他的（）。

A.社会地位就越高

B.个人价值就越高

C.社会价值就越高

D.自我完善就越高
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