A.光電管 B.正比記數(shù)計(jì) C.蓋革記數(shù)計(jì) D.閃爍記數(shù)計(jì)
A.Ba>K>Cu>Ni B.Ag>Al>Cu>Co C.Cu>Cr>Si>Al D.Be>P>Mn>Nd
A.三氯化鐵 B.鄰苯二甲酸氫鉀 C.硬脂酸鋇 D.云母