b. Fill in using the name of the appropriate device. 1. An... uses high frequency sound waves to examine organs inside the body. 2. People use a... to record video without Rusing film. -3. I use an... to read digital books or periodicals. 4. People use a... to display photos without the need of a computer or printer, 5. People use a... at work to send documents electronically over a telephone network and a ... to transfer information from a PC to paper 6. People use a portable... to charge their mobile phones. 7. We use an... system to create and maintain a certain temperature indoors. 3. People use... to provide a higher resolution of images.​