对霍乱病人的密切接触者应采取的处理措施正确的是()
A、严密隔离治疗
B、应急注射疫苗
C、预防性服药
D、严密检疫5天,预防性服药,大便培养
E、随访10天
参考答案:D
He often practice _____ the piano in his room.[ ]
A. play
B. playing
C. to play
D. played
智力是由感知观察力、_________记忆力、_________、思维力等基本要素构成的综合的、稳定的心理特征。