2425.Solenoid valves shall be shown with a notation indicating whether the valve is spring-loaded to the open or closed position.

A. The basis for assuring an airplane remains airworthy and safe to operate is to combine the manufacturer's requirements with sound inspection and maintenance practices.

B. To ensure airworthiness and safe operation of an airplane,it is essential to follow themanufacturer's instructions in the utilization of airplane,and perform sound inspection and maintenance practices as well.

C. Airworthiness and safe operation are fundamental to aircraft utilization as required bythe manufacturer,so sound inspection and maintenance practices are carried out.

D. C.Airworthiness and safe operation are fundamental to aircraft utilization as required bythe manufacturer,so sound inspection and maintenance practices are carried out.

A. 防腐可能有很多原因。

B. 腐蚀可能有很多原因。

C. 腐蚀可能有很多防腐措施。

A. 应说明载荷计算中使用的配载程序和“基本空重”考量。

B. 应说明配载计算时使用的计算程序和“基本空重”数据。

C. 应说明需在载荷计算中使用计算程序和“操作空重”数据。

A. 绕其轴线旋转此曲柄。

B. 绕其圆心旋转此杆。

C. 绕其轴线旋转此轴。

A. Examine the transformer of the floor panel.

B. Examine if the floor panel is laminated.

C. Examine the floor panel for deformation.

A. 任何情况都可以使用手动控制。

B. 在紧急情况下使用手动控制。

C. 在紧急情况下使用手册来控制。

A. 电源接通后再打开外壳。

B. 电源接通前不要打开外壳。

C. 电源接通时不要打开外壳。

A. 本课件仅适用于特定的操作系统。

B. 本软件只适用于特殊的操作系统。

C. 本软件仅与指定的操作系统兼容。

A. You can use the module to disassemble the disassembly fixture.

B. The module that you can use to disassemble is the disassembly fixture.

C. You can use the disassembly fixture to disassemble the module.

A. Most material of the radar scope is fiberglass.

B. Most of the material in the radome is fiberglass.

C. Most of the material in the radar cap is fiberglass.