题目

Tom told me his parents had arrived         Beijing.    A. at                       B. on                     C. in                            D. to 答案：C（2011?于都县）下表中“右眼视力”数据的中位数是4.954.95，众数是5.15.1． 右眼视力 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 人数 4 2 3 5 6 4 12 3 1