860. 每个句子最多20个单词。

Use a minimum of 20 words in each sentence.

Use a maximum of 20 words in each sentence.

Use more than 20 words in each sentence.

正确答案：B

设备系统操作理论翻译

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2503. Relieve system pressure

2502. 功能检查左VHF无线电设备发现其有静电干扰及噪音。

2501. If the aircraft is parked on a slope, make sure that the wheel chocks are in position

2500. 喷气式发动机的基本原理很简单,其结构也非常简单。

2499. 营运人应与当地的管理当局协商,调整间隔时间,使其最适合各自的运营环境。

2498. KNOTS are used throughout to avoid the confusion between knots ( ) and miles per hour ( ) in performance charts and tables

2497. Put the antenna through the top of the slots

2496. Rub the surface with a clean cloth

2495. 飞机在持续适航状态下的维护指南。

2494. The values must not be more than the approved differences