膝关节脱位早期严重并发症是（）。
A.侧副韧带损伤
B.十字韧带损伤
C.半月板损伤
D.腘窝血管神经损伤
E.胫骨棘骨折
参考答案：D
60平方米=______公顷； 10.03千克=______千克______克．
I don't understand this question. Would you please [ ]
A. explain me it
B. explain it to me
C. explain it for me
D. explain it me
