1313、Be careful when you move jet pipes or exhaust cones that have insulating blankets.

　Jet pipes have insulating blankets Be careful when. you move exhaust cones.

　Be careful when you move jet pipes or exhaust cones having insulating blankets.

　Be careful when you move jet pipes, or exhaust cones have insulating blankets.

正确答案：B

解析：

解析:注释:题干主干为“移动带有隔热层的喷气管或排气管时要小心”A 选项将有隔热层作为移动的前提,排除;C 选项将隔热层作为另一种形式,排除。

176、Do not go into the engine test area without approval.

175、Torque the plug to 6 Nm.

174、Make sure that the bogie rollers are aligned with the notches in the track.

173、Make sure that the AC CONNECTED and NOT IN USE lights on the P36 panel are illuminated.

172、Make sure the area for test is free of any people.

171、Replace components that are worn more than the maximum limits：

170 、Each page must bear the date of the original issue until revised and ,when revised, that of the latestrevision.

169、The sealant burns at 109 deg.

168、所有相关数据应按逻辑方式分组。

168 、 The BITE function collects the failures and sends the failure message to the central maintenancecomputer. BITE 功能收集故障信息，并将故障信息发送到中央维护计算机。