小蝌蚪在发育成成蛙的过程中,由于水污染而发生畸形(如长出5条腿),这种现象就叫变态发育 。(判断对错)
已知椭圆的长轴长是短轴长的3倍,则椭圆的离心率等于( )
— Since you are crazy about music, why not go to some ________ concerts?