________for her，Chen Zhong，the last champion，had no chance to take part in the finals.

A．Luckily

B．Unfortunately

C．Obviously

D．Absolutely

用来连接左右梯形节臂的杆件是（），它与左右梯形节臂及前轴构成转向梯形机构。

A、转向纵拉杆

B、转向横拉杆

C、转向垂臂

D、转向节臂