Mr. Smith, together with his wife, ________ coming soon.[ ]

A. are

B. is

C. were

D. does

体外循环心内直视术后病人出现血压下降、脉压差减小、中心静脉压升高、尿量减少、心率增加、脉搏细弱、肢端湿冷和发绀，考虑为（）

A.出血

B.急性呼吸衰竭

C.急性肾衰竭

D.急性左心衰竭

E.低心排综合征