单项选择题

This medication may cause dizziness or lightheadedness,especially when rising quickly from a lying to a standing position．What is the meaning of dizziness or lightheadedness（）

A．低血压
B．心跳加快
C．呼吸困难
D．畏光
E．头晕眼花

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单项选择题
The description of the method should include details of any process,such as solventused,time and temperature of an extraction and concentration,as well as the process used to reduce the level of microbiol contamination．According to the above,which of the following is not included（）

A．所使用的溶剂
B．防止生物污染的措施
C．提取的时间、温度
D．操作人员的情况
E．提取的浓度
单项选择题
In limited test A for arsenic,what test agent should be prepared according to BP(1993 edition)（）

A．mercury bromide solution
B．sodium hydroxide
C．Sand bath
D．Potassium carbonate
E．standard Solution
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