“教育的真正目的就是让人不断提出问题、思考问题。”为此，需要着力倡导（    ）

    Hi, I'm Mary. I'm a pupil. I usually get up at six on weekdays. I have tea and bread for breakfast. I have two friends. One is Lucy and the other is Lily. Lucy often gets up at six thirty. She likes bread and milk. But Lily likes hamburgers and tea. She doesn't like milk at all.

下列有关种群的说法，不正确的是（　　）