语法与词汇 Industrial self-sufficiency in the United Statesdeveloped simultaneously with the mass production oftextiles in New England.
【正确答案】 B
【答案解析】句意：美国工业的自给自足与新英格兰纺织品 的大量生产同步发展。simultaneously同时地。concurrently同时发生地。spontaneously自发地；自然地。