一个长方体的长、宽、高分别是3x-4,2x和x,它的体积等于____
读大陆轮廓简笔画图,按数字顺序,他们分别表示的大陆名称是( )
All the children like Mr. White very much because he often makes them _______.
如图,已知正五边形ABCDE,AF∥CD,交DB的延长线于点F,则∠DFA=____度.