If the radio signal is not clear, adjust the frequency.

A. Perform these checks without any schedule.

B. Perform these checks immediately.

C. Do these checks regularly.

A. The condition of the radome is very important for its performance.

B. The condition of the antenna influences its properties greatly.

C. The condition of the radar has an important effect on its characteristics.

A. 描述飞机机翼副翼、俯冲制动或扰流板系统时，应说明其控制方式。

B. 描述飞机机翼襟翼、俯冲减速板或扰流板系统时，应说明其操作方式。

C. 描述飞机机翼襟翼、俯冲制动或阻力板系统时，应说明其操纵方式。

A. If the wheel temperature reaches as high as 177 deg., the core of safety plug shears off and the tire slips.

B. If the wheel temperature increases to more than 177 deg., the core of the fusible plug melts and the tire deflates.

C. The core of the filter element melts once the wheel temperature is above 177 deg., causing the tire to deflate.

A. 时刻是一个项目的重量和它的手臂的乘积。

B. 力矩是一个项目的重量除以它的力臂的产物。

C. 力矩是一个项目的重量乘以它的力臂的乘积。

A. The emergency procedures check list should be in precise form. The list not only tells pilots which items to check, but also provides everything about operation details of systems.

B. The emergency procedures check list should be in complicated form. The list tells pilots which systems to be investigated. It also provides operation details of some systems.

C. The emergency procedures check list should be in brief form. The list tells pilots which items to be examined. It provides nothing about operation details of any system.

A. Each revision and the effective page should be logged in the logbook.

B. Only the effective revisions pages need to be recorded in the manual.

C. Each manual shall have a record of revisions or effective pages.

A. 文件必须经常修订。

B. 文件必须易于修订。

C. 文件必须容易阅读和看见。

A. 残留在零件上的溶剂会导致腐蚀。

B. 残留在零件上的油液会导致腐蚀。

C. 残留在零件上的溶剂会导致穿孔。

A. The format of the cruise capacity display is determined by the aircraft vendor.

B. The form of the climb performance display is decided by the aircraft manufacturer.

C. The format of the cruise performance presentation is at the discretion of the airplane manufacturer.