某兴趣小组在探究二氧化碳与氢氧化钠溶液反应的实验中，做了如图所示的实验：将足量的氢氧化钠浓溶液装入分液漏斗中，先打开阀门K₁，待氢氧化钠溶液完全进入广口瓶之后立即关闭K₁，充分反应后，打开止水夹K₂，请填写现象：

    Mr. Jackson is a painter. He likes children very much. He always teaches children to paint pictures on weekends.

    Spring is coming Mr. Jackson decided to take children into the garden to paint the beautiful flowers .He took the children to a small garden near the school. The garden was full of spring flowers. Mr. Jackson and children began to paint, but a boy called Andy was just walking around in the garden.

    Two hours later, most of the children finished their pictures. They showed their beautiful pictures to Mr. Jackson. Andy showed his paper to Mr. Jackson, too.

   “What's in the picture?” Mr. Jackson asked angrily. He saw only a piece of white paper .There was nothing on it.

    Andy answered, “I painted some white flowers in the garden and a white bird in the sky.”

根据短文内容，选择正确答案。