组成周期成分的简谐振动可用位移、()和()3个参量来表征。
参考答案:速度;加速度
Mike finished the work quickly, and ______. [ ]
A. So Tom did
B. So did Tom
C. So was Tom
D. So Tom was
应诊断为
A.股骨粗隆间骨折
B.股骨颈骨折
C.股骨粗隆下骨折
D.髋关节后脱位