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【简答题】
Roosevelt, like Churchill, saw the significance of postwar civil aviation, and __________ free and open competition. (believe)
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【简答题】_______________: 占去,占用;开始从事
【简答题】Mr.and Mrs. Gordon were sitting on the sand， reading their magazines． Mr. Gordon was too stingy（吝啬）to rent a chair． Their twelve－year－old daughter，Sandra， was playing at the water's edge． Suddenly a h...
【简答题】在夜间或光线不足的地方进行高处作业，必须有()。