转向梯形机构由（）等杆件组成。
A、左右梯形臂
B、横拉杆
C、纵拉杆
D、转向垂臂
参考答案：A, B
3065155
此患者最可能的诊断是（）
A.胰腺癌
B.酒精性肝硬化
C.肝癌
D.肾癌
E.胃癌
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