单项选择题In gas chromatography, the separation degree is generally as a sign that the adjacent two peaks have been completely separated. A、0.5 B、1 C、1.5 D、2
单项选择题装配是按照规定的技术要求,将零件组合成组件,并进一步结合成部件以至整台机器的过程。 A、正确 B、错误