问题
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When measuring AC current flow, you must always connect the meter _____.
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The term flood current refers to that time when the water ().A.is flowing towards the land
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In a () boiler the water flows through the inside of the tubes while the hotgases pass ro
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When an electric current flows through a wire, a magnetic field appears around the wire.A.
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Too much electric current may flow into a circuit as a result either of a fault in the cir
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What factors influence the climate in Britain?A.A warm current which passes through Britai