骨关节炎康复治疗的目的不是
A.促进软骨生长
B.缓解疼痛
C.改善症状
D.恢复功能
E.延缓进展
参考答案:A
因式分
(1)9(m+n)2-(m-n)2
(2)4a2-4a+1-b2
To be an excellent runner, you must be prepared to _______ much hard work.
A.go through
B.stand for
C.sort out
D.rely on