如图1，在平面直角坐标系中，圆D与y轴相切于点C（0，4），与x轴相交于A、B两点，且AB=6．

​任务型阅读

    John had a busy weekend. On Saturday morning, he went to the library and studied math. On Saturday afternoon, he went to the park. He played tennis with his friend. Lisa was busy on Saturday, too. She cleaned her room in the morning. In the afternoon, she wrote a letter to her cousin(表妹).

    On Sunday morning, John and Lisa read books at home. On Sunday afternoon, they practiced English. In the evening, they saw an interesting talk show with their parents. They had great fun.

读课文《自己试一试》，根据拼音写词语。

金鱼身上有很多（lín）____片，它张开鳞片，把水（jiā）____在鳞片里面了。