骨关节炎影像学表现正确的是()
A.软骨下骨硬化和囊性变
B.非对称性关节间隙变窄
C.关节变形及半脱位
D.关节边缘的骨质增生和骨赘形成
E.以上均是
参考答案:E
“福音”是什么意思?
You should________your post, or you will be punished by your manager. [ ]
A. stick to
B. insist on
C. persist in
D. keep on