室间隔缺损和动脉导管未闭时，若临床上出现声音嘶哑，最常见的原因为

A．左心室增大，压迫喉返神经

B．肺动脉扩张；压迫喉返神经

C．左、右心室增大，压迫喉返神经

D．右心室增大，压迫喉返神经

E．左心房增大，压迫喉返神经

His major task is to integrate the work of Various bureaus under the ministry.()

A. organize

B. correspond

C. coordinate

D. respond