【单选题】酚试剂分光光度法检测室内空气中甲醛,标准曲线的绘制时,以()作参比。
【单选题】下列选项中,用于实现接口的关键字是( )
【多选题】According to Chinese and German government officials and agribusiness executives, what benefits does digitalization have?
A.
It can ensure production capacity.
B.
It can protect the environment.
C.
It can expand sales channels.
D.
It can reduce pollution.
【简答题】CP is the first 6 to invest in China's agribusiness.
【判断题】甲醛的酚试剂分光光度法的标准曲线的绘制,其显色,依据是甲醛和分试剂反应,其反应产物在酸性条件下,被高铁离子氧化为绿色化合物
【判断题】CP is one of the first multinational enterprises to invest China's agribusiness.
【判断题】The term of "agribusiness” covers the complex of farm-related businesses.
【单选题】下列选项中,用于实现接口的关键字是 ( )
【判断题】酚试剂分光光度法检测室内空气中甲醛浓度,标准曲线的绘制是以甲醛含量为横坐标,吸光度为纵坐标,并计算回归线斜率。