物业管理招投标的特点有
A.综合性的特点
B.差异性的特点
C.行业特殊性的特点
D.复杂性的特点
参考答案：A, B, C
There ________. And here ________.
A．goes the phone; she comes
B．is the phone going; is she
C．does the phone go; does she come
D．the phone goes; come she
1/6，1/12，( )，1/48
A．1/30
B．1/15
C．1/24
D．1/20
