题目

---How do you find your visit to Qingdao,Joan?----______.   A.Oh,wonderful indeed       B.I went ther alone   C.First by train and then by ship D.A guide showed me the way   答案：A13．如图：图（一）表示呼吸过程中吸气时的状态，此时，膈肌收缩；图（二） 表示呼吸过程中呼气时的状态，膈肌舒张．