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The _____ in temperature is broadcast twice a day in the channel.
A.diversionB.varietyC.variationD.diversity
C

试题分析:考查名词辨析。句意:天气变化情况一天在这个台播两次。A消遣,分散注意力;B种类,各种各样;C变化,变动;D多样性,差异。故选C。
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