标题: 请教大家2个题（XDF蓝皮） [打印本页] 作者: appleandadam 时间: 2007-7-28 16:50 标题: 请教大家2个题（XDF蓝皮） 1.The demand for airplan mechanics is expected to grow about ten percent a year in the next decade, largely because new federal rules calling for major madifications to older planes and because the air-lines are adding hundreds of new jets. A. B. new federal rules, which call for major modifications to older planes C. new federal rules call for major modifications to older planes D. major madifications to older planes called for by new fedreal rules E. major modifications to older planes are called for according to new federal rules