[单选] 手工凿除超灌桩头混凝土时，正确的操作方式是（）。

转塔头加工中心的主轴数一般为（）个。 10—19。 6—12。 20。 15。 Refer to the exhibit. You want to minimize the downtime that results from supervisor engine switchovers on Cisco 6500 Series Switches and Cisco 7600 Series Routers. To achieve this, you are considering deploying a Cisco Nonstop Forwarding with Stateful Switchover solution using OSPF. In the exhibit you can see the output of the show ip ospf neighbor detail command. Which trait of systems using Cisco Nonstop Forwarding with Stateful Switchover and OSPF is shown in the exhibit output and will impact your plan?（） Stateful Switchover for Cisco Nonstop Forwarding only works with BGP.。 Stateful Switchover for Cisco Nonstop Forwarding must be configured on all adjacent routers.。 Cisco Nonstop Forwarding with Stateful Switchover helper mode is not supported on the adjacent router.。 Cisco Nonstop Forwarding with Stateful Switchover helper mode for OSPF has been promiscuousstandardized and is supported on the adjacent router.。 依据《安全生产法》的规定，生产经营单位主要负责人不依照本法规定保证安全生产所必需的安全投入，导致发生生产安全事故，尚不构成犯罪的，给予主要负责人（）的行政处分。 撤职。 降级。 开除。 一出齿 由概率极限状态设计时，对重力坝应分别按（）极限状态进行 强度验算。   承载能力。 坝址抗压。 坝踵抗拉。 正常使用。 手工凿除超灌桩头混凝土时，正确的操作方式是（）。