52.Install the seat before you install the cushion.

A. The red lights flash in half-second intervals.

B. The red lights twinkle in demi-second.

C. The red lights flag after each half a second.

A. A word in lowercase letters is unapproved in STE.

B. A word in bold letters is unapproved in STE.

C. A wor

D. in

A. Calibrated Airspeed means according to aircraft position,after correction instrument error,the aircraft display speed.Calibrated airspeed can be achieved when aircraft in flight in sea level standard atmosphere.

B. Calibrated Airspeed means the indicated speed of an aircraft,corrected for position and instrument error.Calibrated airspeed is equal to true airspeed in standard atmosphere at sea level.

C. Calibrated Airspeed is the speed of the aircraft shown on the instrument after error correction.The calibrated airspeed is the flight altitude and speed of a real aircraft under normal atmospheric pressure.

A. Use white paper with good strength characteristics and enough weight and substance to eliminate excessive print leakage when printing on both sides.

B. Use good white paper with high strength quality and of adequate weightto delete excessive show-through when printed on both sides.

C. Use white paper with good strength and of sufficient weight and substance to prevent overmuch ink show-through the paper when printed on both sides.

A. State structure of airframe,wings and tail.

B. Present structure of airframe,wings and empennage.

C. Describe structure of fuselage,wings,and empennage.

A. A hydraulic pump operates the motor.

B. A fuel pump operates the motor.

C. A hydraulic motor operates the pump.

A. 对现有分析进行了审查,以确定可能表现出较低安全裕度的部件和区域。

B. 对现有分析进行复核,对部件和区域进行标识,以显示出较低安全裕度。

C. 对于安全裕度较低的部件和区域进行标识并进行了现场分析审查。

A. If the tire temperature is unusually high,open the valve.

B. If the tyre pressure is insufficiently high,open the valve.

C. If the tire pressure is unusually high,open the valve.

A. 描述飞机刹车系统时,应阐述如何最大程度地发挥刹停作用的同时延长刹车的最大寿命。

B. 描述飞机刹车系统时,应描述如何使用最大刹车以及最大程度地延长刹车的使用寿命。

C. 描述飞机刹车系统时,应阐述如何获得最大制动并制动器的最大寿命。

A. 需要注意警告信息和限制条件,例如起落架和控制舵面锁的使用、最小转弯角度、前起落架最大牵引和推动负载等。

B. 需要注意相关预防措施和限制信息,例如起落架和控制舵面锁、最小转弯半径、前起落架最大有效推拖载荷等的使用。

C. 需要注意相关预防措施和限制信息,例如起落架和控制舵面锁的使用、最小转弯半径、前起落架最大推拖负载等。

D. C.需要注意相关预防措施和限制信息,例如起落架和控制舵面锁的使用、最小转弯半径、前起落架最大推拖负载等。