某工人右臂部受外伤,出现腕下垂,X线摄片诊断为右肱骨体中段骨折。该工人是哪一神经受损伤?()
A.腋神经
B.正中神经
C.尺神经
D.肌皮神经
E.桡神经
参考答案:E
The two cities have reached an _____ to develop science and technology. [ ]
A. education
B. excitement
C. agreement
D. invention
ф273×8的无缝钢管长1000m,其容积为()m3。
A、49.68
B、51.87
C、53.50
D、58.53