改变文件的权限用下列哪一个命令（）。
A、Chmod
B、chown
C、rm
D、chgrp
参考答案：A
When I was thirteen, my family moved from Boston to Tucson, Arizona. ... Finally, we arrived
and _____ into our new home. [ ]
A. settled
B. walked
C. hurried
D. stepped
胸腰部关节活动范围测量需在患者后方测量的是（）
A.前屈
B.后伸
C.左旋
D.右旋
E.侧屈
