阿拉伯人灭亡了具有1200年历史的波斯帝国的战役是()。
A. 雅穆克战役
B. 尼哈温战役
C. 壕沟之战
D. 白德尔战役
引起胆囊收缩的一个重要体液因素是______。
A. 胆盐
B. 盐酸
C. 促胰液素
D. 促胰酶素
As a result ______ the air traffic controllers' strike all flights have been diverted to alternative destinations.
A. with
B. from
C. of
D. for
Sometimes very young children have trouble ______ fact from fiction and may believe that such things actually exist.
A. separating B. having separated
B. C. to separate
C. for separating