History, 22.10.2020 18:01 SophieStar15

The photo shows a veterinarian using an ultrasound machine to see inside a dog's body
What is the first step in this process
O A The machine uses sound waves to make an image
O B. Sound waves return to the machine
OC. The machine emits sounds waves into the dog's body
O D. Tissues inside the dog's body reflect sound waves
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The photo shows a veterinarian using an ultrasound machine to see inside a

dog's body
What is the

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