土压式盾构开挖控制的项目不包含（）。 ["开挖面稳定","土压","排土量","盾构参数"]
方向阻抗继电器引入极化电压是为了消除（），在220KV线路保护中方向阻抗继电器记忆时间要求（）。
在盾构机类型中，按开挖面是否封闭划分，不属于敞开式的为（）。 ["泥水式","手掘式","半机械挖掘式","机械挖掘式"]
On a cisco 1000 series controller-based access point，the alarm led is flashing red，but the other leds are off. What is this access point indicating？（） ["its ip address already exists.","it is operating normally.","it requires a code upgrade.","it has lost contact with the controller."]
对库存材料的评估应如何选择评估方法？
配位数
