Scouring is the result of（）. interruption of the normal current flow by the footing。 elevating in mud-slide zones。 penetrating rapidly through a hard crust into weaker soils。 extracting legs from soils with high cohesio。
贯通道特征：高可靠、长寿命；良好的防水性能；转动、连接灵活自如；防压、隔音、隔热；良好的可互换性。
下列属于座席团队资源效率绩效评估的有（）。 电话系统实际可用率。 平均延迟时间。 座席占用率。 平均应答速度。
贯通道就是用于乘客在车厢内行走之用。
River currents tend to（）. pick up speed where the channel widens。 run slower in the center of the channel。 hug the inside of a bend。 cause the greatest depth of water to be along the outside of a bend。
To determine the main bearing clearance of a propulsion diesel engine, you should measure the main bearing shell using a ball anvil outside micrometer and measure the crankshaft journal using a/an （）
