患者，男，67岁。胸痛10小时，伴冷汗淋漓，以往有高血压和主动脉夹层分离病史，体检：口唇发绀，脉搏细速，P110次/分，BP70/50mmHg，ECG示心肌缺血，血清淀粉酶正常，血糖正常。下列哪一项是最可能的诊断

A.急性出血性坏死性胰腺炎

B.肾上腺危像

C.糖尿病酮症酸中毒

D.脓毒性休克

E.心源性休克

CO₂ cylinders，which protect the small space in which they are stored must（）.

A.NOT contain more than 200 pounds of CO₂

B.be automatically operated by a heat actuator

C.have an audible alarm

D.All of the above