:5/7,7/12,12/19,19/31,( )。A.31/49B.1/39C.31/50D.50/31
:5/7,7/12,12/19,19/31,( )。
A.31/49
B.1/39
C.31/50
D.50/31
相关考题:
A.31~33℃B.28~30℃C.34~36℃D.>36℃
:5/7,7/12,12/19,19/31,( )。
A.31/49
B.1/39
C.31/50
D.50/31