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【简答题】
紫外光的热辐射比红外光（）。
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【单选题】Imagine our surprise when five minutes later, we _________Sarah's mum's car driving up to the house!
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【简答题】It was near Christmas during my first term teaching at a new school. I loved my small special class more than any group I had taught in the past. They were hungry for knowledge and I was enjoying teac...
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