在晚期骨关节炎病人的X线片上,可特征性地见到关节间隙____,在关节边缘则可见到____。
参考答案:狭窄、骨赘
We ____ the last bus and didn’t have any money for taxi, so we had to walk home.
A.reached
B.lost
C.missed
D.caught
选用四格表专用计算公式的条件是()
A.T<5且n≥40
B.T≥5或n≥40
C.T≥5且n≥40
D.T≥5且n<40
E.T<5或n<40