雾化吸入药物主要集中在人体什么部位?()
A.肺部
B.肝部
C.骨骼肌
D.心脏
参考答案:A
-- Why? Where is the key to the meeting room?
-- Dear me! You ______ it in the taxi![ ]
A. had never left
B. didn't leave
C. never left
D. haven't left