溺水患者倒水方法（）
A.头顶法
B.膝顶法
C.肩顶法
D.抱腹法
E.肘顶法
参考答案：B, C, D
As to the subject, we have consulted the most _______ professor who gave us _______ explanation.
A．learning; content
B．learned; contented
C．learnt; contented
D．learn; content
