B. Read the statements and circle T for True or F for False. Correct the false statements.
1. Edison and his team invented LED bulbs.
T F
2. LED bulbs use more energy and cost more.
3. Chinese and Korean inventors used movable, block printing before Gutenberg's printing press.
4. The Internet was developed by Kahn and Cerf.
5. The first 3D printer was called a Rapid Prototyping machine.
6. 3D printers are used in home cooking.
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