Analysis: there is only one window in the small room, which shows that the shape of this thing is square, and one side is like a window; Singing and dancing, changing patterns every day, represents the function of this thing. To sum up, the answer is: TV.
American RCA 1939 introduced the world's first black-and-white TV set, 1953 formulated the national color TV standard, and 1954 introduced RCA color TV set.
The mystery of extended information originally originated from folk oral literature, which was created by our ancestors in the long-term practice of production, labor and life, and is the expression of the wisdom of working people.
Example of riddle:
1, although the name is negative, it is actually very positive. I am busy working all day and working hard. (Guess the machine) Answer: tractor.
2, the two brothers are generally tall, they race when they go out, always waiting for the distance and can't catch up. Answer: Bicycle.
3, you can't talk with your mouth, don't eat buns with your stomach, although you don't have stomach trouble and spit a lot of yellow water. (Guess daily necessities) Answer: teapot.
4. Thousands of people weave splendid scenery and bend over to sweat. Originally the sea of Wang Yang, it suddenly became an oasis. (Guess labor) Answer: Transplanting.
5, yellow skin wrapped in red pearls, pearls have bones, can not be worn or worn, sweet and sour. (Guess) Answer: Pomegranate.
Baidu encyclopedia-riddle
Baidu encyclopedia-TV set