鱼类的运动器官是( )
A:鳍
B:鰓
C:鳞片
D:侧线
— His jokes made him a silly person.
— I don't think so. He is a funny man.
计算:(2x﹣y)(2x+y)+y(y﹣6x)÷2x.
中国种植过的一种天然彩色棉花,由江南农民织成“紫花布”,曾是19世纪30年代风靡英国的绅士服装衣料。据此可知 ( )