768.Handbooks may be in loose-leaf form, with durable, multi-ring cover, or permanently bound( )

169.A square wave is produce when there is a flow of electrons for a set period that stops for a set amount of time and then repeats ( )

168.用消毒剂溶液冲洗管道。 ( )

167.确保着陆灯切断开关电源连接安全。( )

166.A 406 MHz digital signal identifies the emergency locator transmitter and its location( )

165.执行此程序来保护碳钢钢索。 ( )

164.This system does not supersede the normal channels of communication for items not covered by the CAP( )

163.升降舵的行程受升降舵动力控制组件的行程限制 ( )

162.当进行每一步的活门测试时,确保没有渗漏,没有腐蚀,没有生锈并且在整个程序结束后再次确认。( )

161.The procedure excludes the removal of the piston( )

160.有时,特别是对于复杂的飞机,可能需要提供特定的培训,以正确维护飞机及其系统。( )