祭月赏月活动始于周代，此活动定为中秋节始于（）。
A．唐代
B．北宋
C．南宋
D．清代
参考答案：B
How much one enjoys himself travelling depends largely on ________ he goes with, whether his friends
or relatives.[ ]
A. what
B. who
C. how
D. why
诊断颌下腺导管结石，拟拍X线片时，首选何种方法
A．颌下腺造影B．下颌骨侧位片C．下颌曲面断层D．颌下腺侧位+下颌横断颌片E．下颌体腔
