对同一根混凝土桩，声波透射法测出的波速应（）低应变法测出的波速。 ["大于","小于","等于","不能肯定"]
泄密途径
Which two statements are true about bandwidth guarantee？（） ["When congestion is present，the priority command doesn’t allow exceeding the allocated rate","When congestion isn’t present，the priority command doesn’t allow exceeding the allocated rate","When congestion is present，the priority command allows exceeding the allocated rate","When congestion isn’t present，the priority command allows exceeding the allocated rate"]
行政发展的主要目的是（）。 ["降低行政成本","优化资源整合","精简行政机构","提升行政能力"]
驾驶员离开车辆而能可靠制停在坡道上，不自动滑溜，需用（）。 ["行车制动器","驻车制动器","离合器","变速器"]
使用DDZ-Ⅱ仪表的调节系统改用可编程调节器，主要应解决哪些问题？
