She must have ranked her birthday presents in order of           because the top one is her favotite.

A．value

B．time

C．Interest

D．Preference

男，30岁。突发性中上腹刀割样疼痛3h，摄片发现膈下游离气体。体检时最可能发生的体征是

A．强迫体位

B．腹式呼吸增加

C．肠鸣音活跃

D．腹膜刺激征

E．肝浊音界缩小或消失