医疗机构制剂配制和检验用的仪器、仪表、量具、衡器等的校验记录应
A．保存一年B．保存二年C．保存三年D．至少保存一年E．保存五年
参考答案：D
Last summer holidays, he went to the countryside and worked together with farmers.In this way
he learnt________from farmers .[ ]
A. a great many
B. a great deal
C. scores of
D. much more
文艺复兴的核心是（）精神的普及与确认。
