支气管哮喘发作时呼吸形式是
A．潮式呼吸B．吸气性呼吸困难C．呼气性呼吸困难D．混合性呼吸困难E．间停呼吸
参考答案：C
172，84，40，18，( )。
A．5
B．7
C．16
D．22
They hear _____ European and American music.[ ]
A. much too
B. too much
C. a lot
D. too many
o many