“买主叫价拍卖”，也称为“荷兰式拍卖”。（）
参考答案：错
— Did Alice enjoy the concert held in Grand Theater yesterday?
— Yes, she did. She _____ such an excellent concert for a long time. [ ]
A. didn't take part in
B. wouldn't take part in
C. hasn't been in
D. hadn't been in
磁体上（）最强的部位叫做磁极。
A、吸引力
B、导磁力
C、导电性
D、磁性
