题目

. There was a strong wind and ________. A. away went his hat   B. away his hat went  C.away did his hat do   D.did his hat go away 答案：A16．一个同学用手中的毫米刻度尺子测量壹圆硬币的直径，四次结果依次为：2.51cm、4.53cm、2.5cm、2.51cm，其中错误的一个数据是2.5cm，错误的原因是没有估计值，硬币的直径应该记为2.52 cm．