I, drink, cake, draw, happy, on, they, present
My name is Alice. Today is my birthday. I am ____My mother and father make a ____for me. There are some oranges ____it. They are my favourite fruit. My friends come to my home with a lot of ____.I prepare (准备) many apples and bananas food for ____ .We talk and share delicious food and ____ Well, where is ____little brother? He sits and ____a picture for us.
某个光子是氢原子核外电子从n=4跃迁到n=1时所发出的,已知普朗克常量h=6.63×10﹣34J•s,求: