My new classmate told us about his trip to _____ Great Wall. He said it was _____ exciting experience for him. [ ]

A. the; an

B. /; the

C. the; /

D. /; a

下列哪种抚养习惯有利于先天性髋关节脱位自然复位（）

A.背篼背孩子使髋部保持外展屈曲位

B.把婴儿下肢伸直包于襁褓内

C.让婴儿自然体位

D.让婴儿头部靠向大人的肩膀，下肢呈下垂位

E.斜抱婴儿，髋关节屈曲位