问题
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A (n) _____ is a chemical or electro-chemical attack on the metal surface which may be further increased if the sea-water is polluted.
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If demand is rising but the firm __________ from communication failure, then stocks wi
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According to the passage, the island got its first soil from ______.A.sea wavesB.the sand
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______ is used to prevent the entry of sea water to the machinery space.A.A special sealin
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In addition to the rising birthrate and immigration, the ______ death rate contributed to
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The tuition fees are ______ to students coming from low-income families. [2007]A.approacha