检查地板是否变形。

A. 按手册将外流活门定位到全开位。

B. 外流活门的人工位置是全开位。

C. 将外流活门人工置于全开位。

A. Oxygen occurs occasionally.

B. Oxidation occurs very easily.

C. Oxygen happens very easily.

A. 信函是白纸黑字印刷的。

B. 字母是白色背景下哑光黑色的。

C. 书信需要黑白复印件。

A. The manufacturer shall prepare all text in either one or two columns with justification at his own discretion , but, two columns are preferable for readability.

B. Manufacturers shall prepare all text both in one and two columns separately; however, two columns are better for reading.

C. According to the manufacturer＇ explanations, all text shall be prepared in one or two columns; however, two columns have better visual effect.

A. 数据应以标准日（ISA）的时间、燃料和从海平面爬升的距离与海拔高度的关系来表示。

B. 数据应能够呈现标准日（ISA）的时间、燃料和从海平面爬升的距离与海拔高度的关系。

C. 数据应显示国际标准大气(ISA)条件下飞机从海平面爬升到某高度所需的时间、燃油消耗量和水平距离。

A. Normally, it is named “fly by electrical control system”.

B. Normally, we name it “fly by electrical system”.

C. This is commonly referred to as “the flight by wire system”.

A. 当必须理解原理图时，最好使用箭头来画出流动方向。

B. 当需要理解原理图时，应该使用箭头来指示流动方向。

C. 当需要理解计划表时，应该使用线条来指示流动方向。

A. An "Airplane Weighing Form" shall be included in each handbook and the form shall contain an airplane side view that shows the location of weighing points (using jacking points or landing gear) relative to the datum line.

B. Each handbook shall provide an aircraft side view that is included in an "Airplane Weighing Form" to show the position of weighing points (using jacking points or landing gear) related to the datum line.

C. An airplane three view that shows the weighing points ((using jacking points or undercarriage) relative to the datum line shall be excluded in an "Airplane Weighing Form" of each handbook.

A. Keep the caps off the hoses.

B. Make sure the caps are off from the hoses.

C. Take the caps off the flexible pipe.

A. 飞机的总体布局应该用一幅比例尺线图来表示，该图由平面、侧面和正面视图组成，在单页上按垂直顺序显示。

B. 飞机的总体布局应包括平面、侧面和正面视图，在单页上按平行顺序显示。

C. 飞机的总体布局应用图片来表示，包括平面、侧面和正面视图，在双页上按垂直顺序显示。