A:badly in need of paint
B:bad in need of painting
C:badly in needing of paint
D:badly in need of painting
物体摩擦产生____。
He _________ that the moon was so bright and round that he could see his friends there.
据《左传·昭公七年》:“天有十日,人有十等。……王臣公,公臣大夫,大夫臣士,士臣皂。”这表明周代社会( )