固位和稳定最好的卡环是
A.三臂卡环
B.双臂卡环
C.隙卡
D.圈形卡环
E.单臂卡环
参考答案:A
The public transports system in many cities in the world()by the local authority.
A.is still ran
B.are still run
C.are still ran
D.is still run
客户投资与净资产比率为( )。
A.0.43
B.0.52
C.0.67
D.0.87