患者男，28岁。空腹突发上腹剧痛4小时，随即出现右下腹痛。查体：上腹及右下腹压痛明显，轻度腹肌紧张，肝浊音界消失，肠鸣音消失。血常规：白细胞及中性粒细胞均升高。该病人最可能的诊断是（）
A. 急性阑尾炎
B. 胃十二指肠溃疡穿孔
C. 肝脓肿
D. 胆囊穿孔
E. 急性胰腺炎
查看答案
Fetch is the（）.
A. distance a wave travels between formation and decay
B. stretch of water over which a wave-forming wind blows
C. time in seconds required for two crests to pass a given point
D. measurement of a wave's steepne
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