A、 Each electrical system is identified by a code.
B、 Each code of electrical system is identified.
C、 Each system is identified by an electrical code.
答案：A
解析：这道题考察的是英语句子的结构和逻辑关系。正确答案是A: Each electrical system is identified by a code. 这句话的意思是每个电气系统都有一个特定的代码来识别它。在英语中，主语（each electrical system）在句子中通常位于句子的开头，然后是谓语动词（is identified），接着是其他成分。在这个句子中，谓语动词是"identified"，表示识别或辨认的意思，而介词短语"by a code"说明了是通过一个代码来识别电气系统。
举个生动的例子来帮助理解：想象一下你的家里有很多不同的电器，比如电视、冰箱、洗衣机等等，每个电器都有一个独特的电气系统。为了方便管理和维护这些电器，你给每个电器都分配了一个特定的代码，这样你就可以通过这个代码来识别和区分不同的电器。这就好比每个电器都有一个身份证号码一样，通过这个号码可以准确地找到对应的电器。所以，每个电气系统都有一个特定的代码来识别它。
A、 Each electrical system is identified by a code.
B、 Each code of electrical system is identified.
C、 Each system is identified by an electrical code.
答案：A
解析：这道题考察的是英语句子的结构和逻辑关系。正确答案是A: Each electrical system is identified by a code. 这句话的意思是每个电气系统都有一个特定的代码来识别它。在英语中，主语（each electrical system）在句子中通常位于句子的开头，然后是谓语动词（is identified），接着是其他成分。在这个句子中，谓语动词是"identified"，表示识别或辨认的意思，而介词短语"by a code"说明了是通过一个代码来识别电气系统。
举个生动的例子来帮助理解：想象一下你的家里有很多不同的电器，比如电视、冰箱、洗衣机等等，每个电器都有一个独特的电气系统。为了方便管理和维护这些电器，你给每个电器都分配了一个特定的代码，这样你就可以通过这个代码来识别和区分不同的电器。这就好比每个电器都有一个身份证号码一样，通过这个号码可以准确地找到对应的电器。所以，每个电气系统都有一个特定的代码来识别它。
A. The parts must be assembled tightly.
B. Make sure that the parts are attached securely.
C. The parts must be assembled loosely.
A. Do not perform any work to the aircraft during maintenance.
B. It is forbidden to refuel the aircraft during maintenance.
C. You can add fuel to the aircraft at any time.
A. The exit doors are mainly used for passenger boarding.
B. The exit doors are only used for evacuation.
C. The exit doors are not only used for the passengers to evacuate from the airplane but also used for normal exit.
A. Soak the element for two hours.
B. Wet the element for two hours.
C. Stove the element for two hours.
A. After the system is pressurized, the elevators will drop down no matter where the rigging pin is installed.
B. Without the rigging pin, the elevators will go down when there is no pressure in the system.
C. The rigging pin can prevent the elevators from retracting and expanding when the system is de-energized.
A. The table is referred to follow the applicable torque values.
B. The applicable torque values are used to obey the table.
C. See the table below for the applicable torque values.
A. Disconnect the connection. This connection is downstream of the valve.
B. Disconnect the connection. The valve is downstream of the connection.
C. Disconnect the valve. The valve is downstream of the connection.
A. Airplane primary data should be displayed neither in graphs and tables.
B. Airplane behavior data shall be predicted in both graphical and tabular formats.
C. Aircraft performance parameters can be represented graphically or in tables.
A. The CAP compiler should determine the format and layout, it is desirable that the format and layout should be similar to the compiler＇s current documents.
B. The format and layout should be determined by the CAP producer, it is intended that the format and layout shall be similar to the producer＇s existing files.
C. The format and layout should be determined by the CAP producer, recognized that it is desirable the format and layout should be the same as the producer＇s existing documentaries.
A. Sometimes, FAA and other airworthiness authority may accept the Continuing Airworthiness Program that uses the Specification.
B. Sometimes, we use the Specification to prepare a Continuing Airworthiness Program that will be accepted by non-FAA airworthiness authority.
C. Sometimes, during preparing a Continuing Airworthiness Program, using the Specification may be accepted by FAA and other airworthiness authority.
