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于1991年10~11月间,采用瑞文测验联合型(CRT—RC),对宁德地区碘缺乏病区的1129名学龄儿童的智力水平进行调查。
Between January and November 1991, 1129 school-age children in the iodine deficiency disorders area of Ningde were investigated for intelligence by CRT-RC.