What wireless technology is used by systems that allow users to pay with their smartphones?

A. Bluetooth
B. RFID
C. LoRa
D. NFC


Answer: D

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What term of rating or measurement is used with electric heat units?

What will be an ideal response?

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All of the following are methods of mechanical cleaning EXCEPT ________

A) Scraping B) Abrasive blasting C) Brushing D) Chemical solvents

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Having changed something about yourself, how would you encourage someone else to make a change?

What will be an ideal response?

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