第18题: [单项选择]佝偻病初期治疗 A. 口服维生素D每日125~250μg(0.5万~1万U),持续1个月后预防量 B. 维生素D250~500μg(1万~1万U)/日,持续1个月,改为预防量 C. 维生素D500-~750μg(2万~1万U)/日,持续2个月,改为预防量 D. 口服维生素D每日30μg(1200U)持续2个月,改为预防量 E. 口服维生素D每日20μg(800U)持续2个月,改为预防量 参考答案:A
A. The gathering of a film club. B. The study of the elements of a petroleum-free community. C. The division of labour among the members of a community. D. The research program of alternate energy sources. 参考答案:B 答案解析:[听力原文]14-17 Those who had seen the film at previous sessions are divided into groups studying