题目6.[单选题]定位轴线端部细实线圆圈的直径为()A. 5-7mmB. 8-10mmC. 10-12mmD. 12-14mm6.[单选题]定位轴线端部细实线圆圈的直径为()A. 5-7mmB. 8-10mmC. 10-12mmD. 12-14mm题目解答答案B. 8-10mm