加工中心的成型铣刀形状精度直接影响工件的尺寸精度。
参考答案：错
电子钱包中存放的主要是（）
A．现金
B．电子现金和电子信用卡
C．电子现金和账户
D．电子现金
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 monthsC．three monthsD．six months
