采购订单中，供货商商品编号是如何自动得出的（）
A.存货基本资料维护
B.供货商价格维护
C.供货商基本资料维护
参考答案：B
- Where is your father?
- He_______ Shanghai for five days. But he will be back soon
A．has gone to
B．has been to
C．has been in
D．has been away
简述影响概念掌握的因素。
