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A semiconductor is a material with a _____.A.conductivity higher than a normal conductorB.
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American colleges and universities accept______.A.normal students onlyB.blind students onl
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_________(62)A.off B.onC.up D.for
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_________(54)A.at B.inC.on D.for
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_________(58)A.by B.onC.in D.for
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_________(58)A.normal B.good C.main D.side
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The middle school is ________ to a normal college