The line of computing jobs waiting to be run on a computer system might be a （）. The jobs are serviced in the order of their arrival，that is，the first in is the first out.

A．queue

B．stack

C．array

D．record

治疗妊娠期阑尾炎正确的是（）

A.妊娠后期应尽量非手术治疗

B.切口需偏高

C.尽量应用腹腔引流

D.不要应用抗生素

E.妊娠后期如阑尾穿孔，应在切除阑尾后待其自然分娩