测量结果显示掌指关节屈曲0°~45°,提示
A.无关节受限
B.伸展受限
C.屈曲受限
D.伸展和屈曲均受限
E.以上都不对
参考答案:C
解析:掌指关节屈曲在0°~90°。
一个等腰三角形,它的一个底角是50°,它的顶角是______,一个等边三角形的边长是9厘米,它的周长是______厘米.
—What happened to Jim?
—His clock didn't work well. It didn't this morning. So he overslept this morning. [ ]
A. set off
B. go off
C. take off