Codman三角见于()。
A.骨结核
B.骨肉瘤
C.骨坏死
D.骨巨细胞瘤
E.骨软骨瘤
参考答案:B
When deeply lost in thought, _______ he often was, he would forget all about eating or sleeping.
A.that
B.where
C.which
D.when
那达慕大会