1703. The two most common types of engines used in helicopters are the reciprocating engine and the turbine engine

A. 按照制造商的意图使用飞机,并结合完善的检查和维修实践,形成了确保飞机保持适航和安全运行的基础。

B. 按照制造商的意图使用飞机,并且结合声音检查和维修实践,表格作为确保飞机保持适航和安全运行的基础。

C. 按照制造商的意图使用飞机,并结合运行声音的检查和维修实践,形成了确保飞机保持飞行和安全运行的基础。

A. The gearbox is installed behind the pneumatic motor.

B. The bump is installed behind the hydraulic motor.

C. The bump is installed behind the pneumatic motor.

A. According to the authority given to persons specified below, the unit recognized in item 3 was inspected in the manner stipulated by authority and is approved.

B. Based on the authority given to the following stated persons, the unit described in item 3 was inspected in the authority defined manner and gets approved.

C. Thanks to the authority given to persons as below, the unit found in item 3 was inspected in the manner stipulated by authority which is approved.

A. 这等效最大值

B. 这是最接近的值

C. 这是等效的最大值

A. Check the drain holes for signs of corrosion.

B. Examine the drain holes for signs of corrosion.

C. Clean the drain holes for signs of corrosion.

A. A In the case that a revision to an illustration happens, a black vertical line or a black hand need not be used to focus on the changed part.

B. If an illustration is to be revised, you may use a black vertical line or a black hand to draw attention to the modified part.

C. A black vertical line or a black hand ought not to be utilized to revise the illustration and draw attention to the changed part.

A. The front panel of the cellphone has a touchscreen and a home button.

B. There is a touchscreen and a home key on the forward panel of a cordless phone.

C. A touchscreen and a main page pushbutton are fixed on the mobile phone forward panel.

A. 如果机身制造商更改了文本或插图,应该使用部件制造商的刊头。

B. 如果机身制造商更改了部件制造商的文本或件号清单,应该使用自己的刊头。

C. 如果机身制造商更改了部件制造商的文本或插图,应该使用自己的刊头。

A. The flow control device, fuel pump included in the system, the control deveices include check valve, accumulator,relay etc.

B. The flow control device,check valve, fuel pump, accumulator included in the system, the control device include the relay.

C. The flow control device, check valve, fuel pump, accumulator relay etc. included in the system.

A. When opening a door, the mechanic not obey the specified safety precautions can easily cause injury to persons standing near the door.

B. Opening a door can easily cause injury to persons standing near the door, the mechanic not follow the specified safety precautions.

C. A mechanic opening a door without follow the specified safety precautions can easily cause injury to persons standing near the door.