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question 60
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a smart refrigerator can use ___ to detect when you are running low on milk, and then send a reminder to you on a wireless network
a. transistors
b. sensors
c. knobs
d. navigation systems

Explanation:

Sensors can be used to detect levels of substances like milk in a refrigerator. They can send signals when the level is low via a wireless network.

Answer:

b. sensors