Thomas Edison often enjoyed ______ strange questions and ______ out good ideas when he was a child.[ ]

A. to ask; trying

B. to ask; to try

C. asking; to try

D. asking; trying

气管异物出现以下临床表现各应属于：剧烈咳嗽及憋气甚至窒息（）。

A.异物进入期

B.安静期

C.刺激与炎症期

D.并发症期

E.后遗症期