The old woman is ( ) tired ( ) she can' t walk on.

A. too, to
B. very, that
C. so, that
D. so, to

CT表现为长骨干骺端广泛骨质硬化，内见坏死区及搅打死骨，常见于

A．成骨性骨肉瘤

B．骨梗死

C．慢性骨髓炎

D．尤文氏肉瘤

E．骨结核