450、Sterilize(消毒) the mask assembly.

A. 　 Landing gear position has no effect on stall speeds.

B. 　 The position of the landing gear doesn't influence the surging speed.

C. 　 The idle speed is not effected by the landing gear position.

A. 　基本上,作者可以使用字典中已批准的词汇作为核心词,

B. 　在主要部分中,作者可以使用字典中已认可的词汇作为核心词。

C. 　在基础部分中, 作者可以使用字典中已核实过的词汇作为核心词。

A. 　飞机燃油系统从中央或主油箱提供增压的燃油。

B. 　飞机燃油供应系统给来自中央或主油箱的燃油增压

C. 　飞机燃油系统提供燃油,这些燃油是从中央或主油箱增压的。

A. 　确保撑杆轮与滑道上的凸槽对齐

B. 　确保转向架滚轮与轨道上的凹槽对齐。

C. 　确保支架凸轮与滑轨上的滑块对齐。

A. 　 The aim of STE is that readers all over the world can easily understand the technical texts and that writers
who are responsible for preparing technical texts know how to prepare them in a easy method.

B. 　 The objective of STE is to provide writers with general principles on how to prepare technical documents in
a clear, simple and distinct manner That readers all over the world can easily understand.

C. 　 The function of STE is to describe how to prepare technical texts in a easy. Clear and specific way and to
allow readers all over the world to understand difficultly.

A. 　 This section tells how to identify a fault by checking flight instruments.

B. 　 This section tells parameters on flight instruments.

C. 　 This section tells how to find a failure of flight instruments.

A. 　原理图应包括被认为是输出源头的发电机、油箱和储液箱

B. 　原理图由被认为是输出源头的发电机、油箱和蓄压器组成

C. 　原理图应排除被认为是输出源头点的发动机油罐和油箱

A. 　 Data shall be managed as time, fuel and distance to climb from sea level versus outside air temperature,
altitude and weight

B. 　 Data shall be presented as time, fuel and distance to climb from sea level versus outside air temperature,
altitude and weight.

C. 　 Data shall be presented as time, fuel and distance to lift from sea level to outside air temperature, altitude
and weight.

A. 　 The airline operator is irresponsible for ensuring that all airworthiness instructions are complied with and
that the handing, servicing and maintenance of the airplane is done when required and according to the

B. 　 The operator is responsible for ensuring that all airworthiness directives are observed and that the
handling, servicing and maintenance of the airplane is done when required and in accordance with the

C. 　 The operator has the duty ensuring that all airworthiness directives are compiled with and that the
handling servicing and maintenance of the airplane is performed when needed and in accordance with the

A. 　 When hydraulic power is supplied, keep persons and equipment away control surfaces and landing gear.

B. 　 When supplying power to the hydraulic system, persons and equipment should be away from all control
surfaces and landing gear.

C. 　 Persons and equipment shall be away from all hydraulic system control surfaces and landing gear when
supply pressure.