Some things can carry messages, for example, a sign at the bus stop helps you to know which bus to take. Signs on the door tell you where to go in or out. Have you ever noticed that there are a lot of signs around you and that you receive messages from them all the time?

    People can communicate on many other ways. An artist can use his drawing to tell about beautiful mountains, about the blue sea and many other things. Books are written to tell you about all the wonderful things in the world and also about people and their ideas.

    Books, magazines, TVs, radios and films all help us to communicate with others. They all help us to know what is going on in the world and what other people are thinking about.

植物细胞中，能将太阳能转化成化学能的结构是（  ）

在藏族同胞的庆祝活动上，你可见到的场景是（    ）

根据下表，完成以下问题。