80,62,45,28,( )A.20B.18C.12D.9
80,62,45,28,( )
A.20
B.18
C.12
D.9
相关考题:
蛋白质的平均含氮量为 ()。A.16%B.18%C.12%D.6.25%
80,62,45,28,( )
A.20
B.18
C.12
D.9