You’d better let each student read       his own tastes and choices.

A．in need of

B．in favor of

C．in terms of

D．in spite of

小气道病变有如下特点，除去（）

A.总横断面积比中央气道大

B.气流速度慢，病原体易沉积

C.腺体、杯状细胞和纤毛细胞减少或消失

D.小气道的开放主要靠周围组织的牵引

E.分泌性IgA水平高