急性胰腺炎病情变化重要指标（） A.血清淀粉酶>500U B.血清钙 C.白细胞>1

导致代谢性碱中毒的最常见外科病是（）

A.幽门梗阻

B.高位小肠梗阻

C.低位小肠梗阻

D.结肠梗阻

E.肠系膜上综合征

论述市场竞争对餐饮定价的影响。

You are ______ to be hit by lightning ______be attacked by a shark, so don’t be frightened by sharks.

A．more likely 30 times; than

B．30 times as likely; than

C．30 times as more likely; as

D．30 times as likely; as

肾梗死属于（）。

A.凝固性坏死

B.液化性坏死

C.湿性坏疽

D.干酪样坏死

E.干性坏疽

TOSI锅炉正常运行时，磨煤机人口一次风温度应不高于（）℃。