412.You can replace a large number of units during engine installation.

A. 在触碰热表面时,这种材料会释放出危险的香味。

B. 在接触到热的操纵舵面时,这种材料会产生奇怪的烟雾。

C. 这种材料接触热表面时会释放出危险的烟雾。

A. Please designate licensed personnel to do modification or maintenance to airplane.

B. Alterations or repairs to airplane shall be accomplished and noted by licensed personnel.

C. Please note that alterations or repairs to airplane must be accomplished by licensed personnel.

A. Emergency Lighting is a independent subsystem used to provide illumination in case of primary electrical power failure.

B. Urgency Lights that supply the lights when the major electronic power fails is a separate subsystem.

C. Ambulance Lights is used to supply lights if the main electrical sources malfunctions as an independent subsystem.

A. According to Boeing Docs and associated ADs,changing the dimension of the thrust reverser upper locking actuator lock sensor target can result in slow detection of the failure or undetected failure.

B. Based on the Boeing Docs and the associated ADs,if the size of the thrust reverser upper locking actuator lock sensor target is increased,it may result in delayed or undetected the actuator failure.

C. As described in Boeing Docs and the associated ADs,if the orientation of the locking actuator on the thrust reverser locking sensor target changes,the actuator failure will be delayed or undetected.

A. The forward movement of the control lever must be slow and continuous.

B. The control lever must be kept moving forward slowly and abruptly.

C. You must continuously slow down the forward movement of the control lever .

A. The shim is t,which is thick by calculating x and y.

B. Calculate the shim,the result of the thickness is x-y .

C. The thickness of the shim is thus calculated: t=x-y.

A. 使复合材料变干燥。

B. 发出脱水的指令。

C. 使化合物变干。

A. 应该提供手册中使用的符号、缩略语和术语的定义或解释。

B. 应该定义并解释符号,并提供手册中术语和缩略语的使用方法。

C. 应该用手册来定义和解释符号,缩略语,术语的使用。

A. 正确的标点符号很重要,因为它表明了文本的不同部分是如何联系在一起的,并防止了歧义。

B. 正确的标识很重要,因为它表明了文本的不同部分是如何构成的,并防止了误解。

C. 正确的符号很重要,因为它展示了文本不同部分的构成情况,并防止了错误。

D. C.正确的符号很重要,因为它展示了文本不同部分的构成情况,并防止了错误。

A. In order to set the configuration and operate the system,the operator uses an external joystick and control panel.

B. An external joystick and control panel is used to make the configuration and operate the system.

C. To operate an external joystick and control panel for the configuration and the system operation.