Nowadays it is difficult for people to find ______ work in the world because ______ economic

situation is very serious.[ ]

A. /; an

B. /; the

C. the; the

D. a ; /

横轴位鼻咽腔CT图像表现为双梯形的层面位于

A．咽隐窝水平

B．软腭上水平

C．咽旁间隙水平

D．硬腭水平

E．咽鼓管隆突水平