分娩先兆征象最可靠的是()
A.见红
B.不规律子宫收缩
C.宫底下降
D.规律子宫收缩
E.宫颈扩张
参考答案:A
He was late for the meeting _________ the heavy snow.
A.as a result
B.because of
C.as a result of
D.in the result
如怀疑有下颌下腺导管结石,以下哪种X线片检查为首选()
A.下颌下腺造影
B.下颌体腔片
C.下颌曲面断层片
D.下颌下腺侧位片加下颌横断片
E.下颌骨侧位片加下颌横断片