A、 One or more separate documents for some types of equipment such as avionics and instrumentation may be required because they change frequently or they have various combinations.
B、 Some types of equipment such as avionics and instrumentation are changed regularly or combined in different forms, requiring to have one or more separate documents.
C、 Some types of equipment such as avionics and instrumentation are often revised or combined differently to require one or more separate documents.
答案：A
A、 One or more separate documents for some types of equipment such as avionics and instrumentation may be required because they change frequently or they have various combinations.
B、 Some types of equipment such as avionics and instrumentation are changed regularly or combined in different forms, requiring to have one or more separate documents.
C、 Some types of equipment such as avionics and instrumentation are often revised or combined differently to require one or more separate documents.
答案：A
A. Take care to the absence of leakage during the execution of each step in the valve test.
B. Throughout the valve test, verify that there are no obvious signs of leakage at each step.
C. Make certain that no leakage is present as you proceed with each step of the valve test.
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. Flash the screen with hot water.
B. Fresh the filter with hot water.
C. Rinse filter in hot running water.
A. The units used by pilots are the most valuable.
B. The units used are those which are the most expensive for pilots.
C. The units are the most useful for the pilots.
A. Use the clean solvent again to leave the oils on the surface.
B. If necessary, clean the oils by applying clean solution.
C. Remove the oils, if necessary, by applying clean solvent again.
A. If there is a available service bulletin to correct the problem of moisture ingress into the connector cavity,the letter then will be useless.
B. Refer to this letter to help mitigate moisture ingress into the connector cavity even if there is a available service bulletin to correct the problem.
C. If there is a available service bulletin to correct the problem that moisture ingress into the connector cavity, the letter then will provide procedures .
A. Move the IDG forward and outboard until it is away from the accessory gearbox, QAD ring and power plant.
B. Move the IDG towards the forward position until the input shaft is away from the accessary gearbox and QAD ring, then move the IDG towards outboard and free of the power plant.
C. After moving the IDG towards the forward position, then it is free of the accessary gearbox, QAD and the power plant.
A. Inspect the fairing completely.
B. Do a detailed visual inspection of the fairing.
C. Inspect the whole fairing.
A. This Section shall be clearly stated and cross-referenced to the proper paragraph in Section 2 of the Handbook which consists of limitations.
B. This Section contains limitations which shall be clearly stated and cross-referenced to the proper paragraph in Section 2 of the Handbook.
C. The proper paragraph in Section 2 of the Handbook shall describe and cross-reference this Section included in this limitations.
A. The Boeing 747 symbolizes the beginning of a new ear in air transport.
B. The Boeing 747 is the first type of airplane in air transport.
C. Modern air transport started from the Boeing 747.
