分子和分母相同的分数都等于1。[ ]
正确
—Was he sorry for what he'd done?
—________.[ ]
A. No wonder
B. Well done
C. Not really
D. Go ahead
导致趾背伸力弱的是()
A.L1~2椎间盘突出
B.L2~3椎间盘突出
C.L3~4椎间盘突出
D.L4~5椎间盘突出
E.L5~S1椎间盘突出