Keep quiet to avoid missing the sound of signal.

A. 如果结果不同，请执行此测试。

B. 如果数值不同，请执行此测试。

C. 如果数值相同，请执行此测试。

A. 警告和注意事项中的文字将标为粗体，而注释可以在适用的文本之后，取决于要重点突出的材料。

B. 为了突出材料的重点，警告和注意事项应在其适用的文本之前，但注释可以在适用文本之前或之后。

C. 警告和注意事项应在其适用的文本之前，但注释可以在适用文本之前或之后，具体取决于要突出显示的材料。

A. The turbines are used to extract energy from the exhaust gases and are coupled to the crankshaft.

B. The turbines can drive energy to exhaust gas and connects crankshaft.

C. The turbines can extract energy from the exhaust gases and drive the crankshaft.

A. You can calibrate all the compass systems at the same time.

B. You can fix all the compass systems at the same time.

C. You can calibrate all the magnetic needle systems at the same time.

A. The STE dictionary gives an approved alternative that has a different part of speech.

B. The STE dictionary gives an approving alternative word has a different word class.

C. The English dictionary gives an approved alternative word with a different part of speech.

A. 描述飞机起落架时，应描述收回方法（如有）。

B. 描述飞机起落架时，应描述撤回机构（如有）。

C. 描述飞机起落架时，应描述起落架收上机制（如有）。

A. The exhaust from the Auxiliary Power Unit is dangerous.

B. The exhaust from the nozzle unit is dangerous.

C. The exhaust from the Auxiliary Power Unit inlet is dangerous.

A. Use the same hydraulic fluid to lubricate the engine and all auxiliary equipment.

B. The lubricant used on engine and all auxiliary equipment are identical.

C. The identical grease is used to lubricate the engine and all auxiliary equipment.

A. The damper prevents abnormal movement of the control.

B. The control is protected from unusual movements by the damper.

C. The damper prevents sudden movement of the control.

A. 为了供应充足，沿着侧壁和天花板中心的出口将空气分离。

B. 为了供应不过量，沿着侧壁和天花板中心的出口将空气分离。

C. 为了供应对称均衡，沿着侧壁和天花板中心的出口将空气分离。