目前，我国应用的死亡标准是（）
A.心肺死亡
B.脑死亡
C.心肺与脑死亡
D.深度昏迷
E.呼吸停止标准
参考答案：E
脊柱最容易受损的部位是（）
A.C5~7
B.T4~5
C.L2~4
D.T12～L2
E.L5～S1
Liu Hua often helps her sister __________ lessons.[ ]
A. with his
B. for her
C. with her
D. of her
