线段a=4.5,b=2,则a,b的比例中项是( )。
3
Some students were too tired on after the tiring trip .
A. not to walk B. walk C. to walk
根据《江苏省道路运输从业人员信用管理办法》,从业人员在评定周期内累积记分达()分,应进行继续教育。
A.15
B.18
C.20
D.25