将主型芯从成型位置抽至到不妨碍塑件的脱模位置所移动的距离称为抽芯距。
参考答案：对
技能学习阶段的正确顺序是（）
A．定向；分解；熟练；定位
B．定向；分解；定位；熟练
C．分解；定位；熟练
D．定位；分解；熟练
The Customs shall reply in writing within （） from the date of receipt of the application for the refund of the duty paid and notify the applicant of its decision.
A. one month
B. two months
C. three months
D. six months
