下列病变多见于骨干的是()
A.骨囊肿
B.骨巨细胞瘤
C.尤文肉瘤
D.软骨肉瘤
E.以上都不是
参考答案:C
Two _____ of this apple has gone bad.[ ]
A. three
B. threes
C. third
D. thirds
违拗症