Long long ago, there was a swan（天鹅）with golden feathers（金羽毛）.She lived in a lake.

    A woman lived in a small house1the lake with her two daughters. They were very poor. They worked hard all year round,2 still, they lived a hard life and sometimes they even didn't have enough 3to buy food.

    The swan was 4to see that. She said to herself, “I'll give one of my5 to them each day, then they can live a happy life with the money selling my feathers.” That evening, she6to the poor woman's house and left a golden feather on the table without saying7.From then on, the swam came every day and gave them a feather. The woman was very happy because their life was much8than before.

    But day after day, the woman became greedy（贪婪）.She said to her 9”The swan may fly away one day. If so, we will be poor again. We should take all10feathers when she comes next time.” “Oh, no, Mom!” cried the daughters, “This will 11the swan. She helps us a lot !”But the mother wouldn't listen. When the 12came as usual, the mother caught her and took all her feathers .But suddenly, the golden feathers 13chicken feathers.

    Then ,the Golden Swan said, “Poor Mother, I came to 14 you, but you wanted to kill me. Now, I am leaving and will 15come back. Never be greedy!” With these words, the swan flew away.

下表为四种农作物产销资料，假如该地区是一个地势平坦的平原，可种植花卉、蔬菜、稻米和甘蔗等四种农作物，其产品全部提供某一市场消费，且地价相同，根据该表格提供的信息可知，如果土地距离城市（消费市场）为l千米，则从经济效益看，以下作物中最适宜种植的两种是（　　）

①水稻       ②花卉       ③甘蔗       ④蔬菜．