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问题 单项选择题

首次剂量加倍的原因是( )。

A．为了使血药浓度迅速达到Css

B．为了使血药浓度持续高水平

C．为了增强药理作用

D．为了延长半衰期

E．为了提高生物利用度

答案

参考答案：A

解析：[知识点] 连续多次给药的时量曲线和稳态血药浓度

问答题 简答题

尾气中H2S/SO2比值影响因素是什么？
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单项选择题

What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? （）

A.No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency

B.The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received

C.The Operator should immediately set continuous watch on VHF channel 70

D.The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received
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