J-50-12是（）地形图的代号。
A.1：100万
B.1：50万
C.1：25万
D.1：10万
参考答案：D
Do you often say "______" to your parents before you go to bed? [ ]
A. Good evening.
B. Goodbye.
C. Going to bed.
D. Good night.
竞买人之间、竞买人与拍卖人之间恶意串通的法律责任是什么？
