_______cool it is to take a photo with little Cindy! The lovely girl in the program called “Where’re we going, Dad!”

A．What

B．What a

C．How

D．How a

下列哪项不是“干性支气管扩张”的特点

A．平时无咳嗽

B．多位于引流不畅的部位

C．一般无脓性痰

D．反复咯血

E．不易感染