单项选择题The height of a police officer is what type of variable? A、Qualitative (Categorical) B、Quantitative and continuous C、Quantitative and discrete D、Qualitative and continuous
单项选择题中国药典规定的“熔点”是指A. 供试品在初熔至全熔时的温度范围B. 供试品在局部液化时的温度范围C. 供试品在熔融同时分解时的温度范围D. A或BE. A或B或C
