A shark(鲨鱼)sees a monkey. It says, “Hello, my friend, would you please come to my house? My mother and the others of my family want to see you.”

    “That's very good.” the monkey says, “But I can't swim.”

    “Oh, sit on my back. I'll take you there.” On the way, the shark says, “I must tell you my mother is ill, she wants to eat your heart.”

    “But I'm sorry, I don't bring it with me. I put it in the tree. Take me back and get it.” says the monkey.

    “Let's go back.” shark says.

    When they return, the monkey climbs up the tree and leaves the shark waiting for him in the water.

以基因型为Aa的水蜜桃为接穗，嫁接到基因型为AA的水蜜桃砧木上，嫁接上的枝条所结的水蜜桃果肉基因型是纯合体的几率（   ）

读下列四幅图，选择四幅图的代号与相应词句连接起来。

①广袤坦荡____         A

②水网纵横____         B

③冬季漫长____         C

④沟壑纵横____         D