A:液溴和四氯化碳
B:苯和蒸馏水
C:乙醛和乙醇
D:溴苯和苯
—This pair of shoes _______really small for me
—Why not try another _________.
— I wonder _______.
— I'm afraid we'll be late.
已知⊙O1与⊙O2外切于点A,⊙O1的半径R=2,⊙O2的半径r=1,若半径为4的⊙C与⊙O1、⊙O2都相切,则满足条件的⊙C有( )