预产期的计算是从
A．末次月经结束那天算起
B．受孕前月排卵期算起
C．末次性生活算起
D．末次月经第14天算起
E．末次月经来潮第1天算起
参考答案：E
My sister _____ as a secretary in her company for three years and now she _____ to
the manager of the sales department. [ ]
A. served; has been promoted
B. had served; has been promoted
C. has served; has promoted
D. was serving; has promoted
患者女性，50岁，因“开车时急刹车致胸部疼痛”来诊。查体：胸骨柄处压痛（+），胸廓挤压征（+），头部后仰时胸部疼痛加重，无神经障碍，舌质暗红，舌苔黄腻，脉弦数。
最有助于确诊的依据是（）
A.胸骨多层螺旋CT
B.胸骨MRI
C.胸骨CT
D.胸骨正侧位X线片
E.胸部B超
F.胸部彩色多普勒超声
