修改页眉页脚可以通过哪些途径？（） ["单击“视图”菜单中的“页眉和页脚”命令","在“格式”菜单的“样式”命令中设置","单击“文件”菜单中的“页面设置”命令","直接双击页眉页脚位置"]
When the helm demands a 20°right rudder movement from an electro-hydraulic steering gear, which of the listed actions will be the FIRST action to happen when this rudder position is attained?（） ["The six-way valve opens","The steering service pump motor is stopped","The follow-up gear takes the pump off stroke","The cylinder relief valves bypass oil to the suction side the pum"]
参与微管和微丝装配的核苷酸（） ["都是ATP","都是GTP","分别是ATP和GTP","分别是GTP和ATP"]
客户信息变更时不可以对客户的常用手机号进行变更。
配电网线路故障处置有哪些基本要求？
简述纱线接捻方法。
