A:水中“月亮”
B:雨后彩虹
C:皮影戏中的“手影”
D:.在阳光直射下,大树底下出现的“阴影”
在设计对照(对比)实验时,我们应该注意的问题是( )
Hello. I am Amy. I am eight years old. Today is my birthday. Look, I have a birthday cake. I have juice and rice for dinner. And I have many gifts, too. A red toy monkey, two new bags and five storybooks. I am so happy today.