A.21,819个
B.20,445个
C.21,429个
D.10,465个
[单选题]A.B.C.D.
[单选题]( )A.12B.14C.16D.20
[单选题]( )A.3.6B.1.5C.0.9D.0.6
[单选题]( )。A.3B.5C.7D.9
[单选题]( )。A.28B.24C.14D.13
[单选题]( )。A.36B.72C.48D.70