Electric magnets are used in steel works to ________. A. lift heavy weights up to ten tons B. test the steel for strength C. heat the molten steel D. boil a jug of water

Electric magnets are used in steel works to ________.

A. lift heavy weights up to ten tons  
B. test the steel for strength
C. heat the molten steel            
D. boil a jug of water

Trả lời

Chọn đáp án A

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