------Nice to meet you, Mike. ____________?

------Everything is OK. Thanks.

A．How is it going

B．What are you doing

C．How are you going

D．How are you

哪项不是干哕音的听诊特点

A．音调较高

B．持续时间较长

C．吸气及呼气时均可听及，但吸气时明显

D．强度和性质易改变

E．部位易变换