非背部重要骨性标志的是（）。
A、枕外隆突
B、肩胛冈
C、第2颈椎棘突
D、肩胛下角
E、第7颈椎刺突
参考答案：C
With his work completed, the businessman stepped back to his seat, feeling pleased_____ he was a man of action.
A．which
B．that
C．what
D．whether
汽车主销后倾角由前轴、钢板弹簧和（）装配在一起时，使前轴向后倾斜而形成的。
A．轮毂
B．转向节
C．车架
