陶器的发明标志着烹饪技术的第一次飞跃，人类真正进人了烹饪时代。 ( )
参考答案：对
Frank insisted that he _____ asleep I had great difficulty in waking him up.
A. was not
B. shouldn't be
C. were not
D. shan't
男性，6岁。于进食时出现呛咳，随即出现胸闷、进行性呼吸困难。查体：口唇发绀，可闻及喉鸣、三凹征阳性。患者最可能的诊断是（）
A.气管受压
B.支气管哮喘
C.急性喉炎
D.喉水肿
E.气管异物
