4J4.政府采购货物和服务的( )大多数采用资格后审方法。A.邀请招标 B.单一来 发布时间:2017-06-09 17:52 │ 来源:www.tikuol.com 题型:单项选择题 问题: 4J4.政府采购货物和服务的( )大多数采用资格后审方法。A.邀请招标B.单一来源采购C.公开招标D.询价
题型:单项选择题 ()is not a job of the radar antenna.A.To receive the high-frequency pulses from the transmitterB.To focus the pulses into a beam,and send them into spaceC.To pick up reflected pulses coming from objects that have been struck by the beamD.To reflect microwaves 查看答案