It _____ have been Tom that parked the car here, as he is the only one with a car. [ ]

A. may

B. can

C. must

D. should

符合中度等渗脱水的是下列哪一项

A．失水量占体重4%，血清钠135mmol/L

B．失水量占体重6%，血清钠140mmol/L

C．失水量占体重8%，血清钠155mmol/L

D．失水量占体重10%，血清钠125mmol/L

E．失水量占体重12%，血清钠135mmol/L