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Section A Invention Museum How much is it? 18 How much is it? Rule Only one group that gets the most scores(分?jǐn)?shù) )can enter the museum. Guessing: What is it? Guessing: What is it? Guessing: What is it? Microwave oven It is used for cooking and heating food (加熱 ) What food can be heated in it? What is it used for? When was it invented? It is used for counting. calculator What are they used for Do you know when it was invented? They are used for giving light. light bulbs Look at the things below. In what order do you thin