A. did not see B. have not seen C. had not seen D. had not been seeing
A. 正确 B. 错误
A. 肘关节呈半屈曲状 B. 肘后可摸到凹陷 C. 上肢较短 D. 骨鹰嘴明显向后突出 E. 肘后三角失去正常关系