A.銀:115-150g/l、銅<38g/lB.銀:145-150g/l、銅>38g/lC.銀:145-150g/l、銅≤38g/lD.銀:115-150g/l、銅≥38g/l
A.>10B.<10C.4-7D.5-7
A.銅粉;鐵粉B.鐵粉;銅粉C.銅粉;液堿D.鐵粉;液堿