Usually the old people ______ because they feel lonely at times. [ ]

A. love listening

B. like to listen to music

C. love to be listened to

D. like to be listening

发声时振幅最大处是（）

A.声带的前2／3部

B.声带的中点处

C.声带膜部的中点处

D.声带膜部的前中1／3交界处

E.声带膜部和软骨部交界处