临产调护六字要诀是：（ ）
A．惜力、忍痛、勿慌
B．睡、忍痛、慢临盆
C．安静、忍痛、整洁
D．安静、睡眠、忍痛
E．睡、忍痛、少活动
参考答案：B
On May 5, 2005, at ____ World Table Tennis Championship, Kong Linghui and Wang Hao won the gold medal in men’s couples with ____score of 4:1.
A．a; a
B．不填；the
C．a; 不填
D．the; a
设有下列二叉树：
对此二叉树中序遍历的结果是
A．ABCDEF
B．DBEAFC
C．ABDECF
D．DEBFCA
对此二叉树中序遍历的结果是