下列必须进行金穗借记卡卡片激活后方可使用的是（）
A.批量开卡
B.惠农卡
C.贵宾借记卡
D.同号换卡
参考答案：D
— She is a credit to her family,for she has a small fortune ______ her credit.
— A credit to her family? Her father has to buy his daily necessities _______.
A. on;on credit
B. in;in credit
C. to;on credit
D. under;with credit
负载曲线的分类有哪几种？
