2703. To prevent damage to the engine, immediately install protective covers on all openings

为防止损坏发动机,立即打开所有安装的防护罩。

为防止损坏发动机,稍候装上所有开口的防护罩。

为防止损坏发动机,立即在所有开口上安装防护罩。

正确答案：C

设备系统操作理论翻译

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660. CAREFULLY LIFT THE MAGNETIC LEVEL INDICATOR UNTIL YOU ( ) THE MAGNETS

659. 测量硅胶吸收水分所需的时间。

658. THIS CONDITION WILL CAUSE DETERIORATION OF THE STRUCTURE

657. Before you ( ) the unit, do the specified test procedure

656. When you select terminology or wording, always use a consistent style

655. Back of the title page should be left blank except for items such as a manufacturer’s logo

654. Boost pump is an electrically driven centrifugal pump mounted in the bottom of the fuel tanks in large aircraft

653. 是什么导致的事故仍然是个谜。

652. 通常,发动机被安装在大翼下,可是,对于现代飞机,两个侧发被安装在机身外侧的吊架上。

651. 拆下将变速箱壳连接至发动机的螺栓。