A.已從數(shù)萬上升到上百萬 B.已從數(shù)百萬上升到上千萬 C.已從數(shù)十萬上升到上百萬 D.已從數(shù)十萬上升到上億
A.2000 B.2001 C.1998 D.1999
A.2:1 B.1:10 C.2:10 D.1:2