Can you imagine that a smart man like him_____ make such a stupid mistake?

A．might

B．should

C．would

D．need

老年患者突然出现下列哪些不明原因的病况时，需考虑急性心肌梗死发生的可能()

A．上腹胀痛或呕吐

B．频发性室性期前收缩

C．胸骨体上段后方疼痛，休息后缓解

D．面色苍白、出冷汗

E．端坐呼吸、发绀