【名词&注释】
副作用(side effect)、骨质增生(hyperosteogeny)、化脓性关节炎(suppurative arthritis)、鉴别能力(ability to differentiate)、肺动脉主干(pulmonary artery trunk)、右下肺动脉(right inferior pulmonary artery)
[单选题]正常成人右下肺动脉(right inferior pulmonary artery)主干(pulmonary artery trunk)直径一般为()。
A. ≤5mm
B. ≤8mm
C. ≤10mm
D. ≤15mm
E. ≤20mm