A. word B. promise C. vow D. claim
A. on B. with C. about D. in
A. harming B. harmful C. hurting D. hurtful
A. staring at B. glancing at C. looking D. watching
A. 常见于股骨下端、胫骨和腓骨上端 B. 高度恶性 C. 晚期易发生肺转移 D. X线表现骨破坏与成骨并存