Theconceptofmaglevtransportationwas 国语站 题库 6.18K 大中小设置文字大小 问题详情: The concept of maglev transportation was ______first presented in the mid-20th century and the first commercial maglev train line was put into ______ operation at Birmingham Airport in Britain in ㊣1984A. the; the B. the; / C. /; the D. /; / 【回答】D知识点:冠词题型:选择题 TAG标签:#