2031. The main frame of the wing includes spars, ribs, stringers, integral fuel tank structure, tip tank supporting structure and frames around openings

大翼的主要结构框架包括梁、肋、桁条、燃油箱整体结构、翼尖油箱支撑结构和开口周围结构。

大翼的主要框架包括隔框、肋、加强筋、内部燃油箱结构、翼尖油箱支撑结构和结构周围的开口。

大翼的主要结构包括翼梁隔框、肋条、内部燃油箱结构、翼尖油箱支撑结构和结构周围的开口

正确答案：A

设备系统操作理论翻译

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1332. Obey local regulations for the correct procedures to use or discard solvents

1331. Make sure that the position of the clamp agrees with the position that you recorded during the removal procedure

1330. Make sure that the doors are closed during the pressurization test

1329. It is the responsibility of the airplane owner and the pilot to insure that the airplane is loaded properly

1328. To attach an item in or to a second item

1327. IF YOU ( )THAT THE HYDRAULIC PUMP DOES NOT OPERATE CORRECTLY, EXAMINE THE PUMP

1326. Though techniques such as shading, crosshatching, screening or similar means are recommended, the use of color is permissible

1325. BE CAREFUL WHEN YOU ( ) PRINTED CIRCUIT BOARDS

1324. Each Chapter or Section is to start with a general description of the system and its operation and should be labeled Description and Operation

1323. 如果由于腐蚀而无法拆卸螺栓,则使用渗透油。