OZ
OZDIC
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polarity
mastery
UK /pəˈlæɹɪti/
US [pəˈlɛɹɪɾi]
noun
card 1 of 10
· fill in the blank
He
_____
the polarity of the magnet.
1.
reversed
2.
experimented
3.
tested
4.
revealed
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