A、 Explaining how to obtain the maximum ground miles per gallon through careful flight planning and attention to good operating procedures is the primary content.
B、 Display how to achieve the main objective to get the greater ground miles per gallon by careful flight planning and attention to good operating procedures.
C、 The principal purpose is to show how to increases the ground miles per gallon as much as possible with careful flight planning and attention to good operating procedures.
答案：C
A、 Explaining how to obtain the maximum ground miles per gallon through careful flight planning and attention to good operating procedures is the primary content.
B、 Display how to achieve the main objective to get the greater ground miles per gallon by careful flight planning and attention to good operating procedures.
C、 The principal purpose is to show how to increases the ground miles per gallon as much as possible with careful flight planning and attention to good operating procedures.
答案：C
A. Before restarting the engine, make sure to clear the ground from any fuel spills.
B. Remove all spilled fuel from the ground before making the first attempt to start the engine.
C. Ensure that no fuel on the ground is eliminated before proceeding with engine startup.
A. Only representatives from ASD can join the group.
B. Representatives from countries that are not members of ASD are hardly to take part in the group.
C. Both representatives from ASD and from countries that are not members of ASD can join the group.
A. There is enough oil.
B. Some oil must be drained.
C. More oil must be added.
解析：这道题考察的是对英语中"enough"和"sufficient"的理解。在题干中说油箱里有足够的油，这里的"sufficient"和"enough"都表示"足够的"意思。在选项中，选项A说"There is enough oil."，意思是"有足够的油"，符合题干的意思，所以答案是A。
举个生动的例子来帮助理解，就好比你在煮面条时，如果水里有足够的水，面条就能够被充分煮熟。这里的"足够的水"就可以用"enough water"或"sufficient water"来表达。
A. If the drain hole is blocked, clean it.
B. If the drain hole is leaked, clean it.
C. If the drain hole is locked, clean it.
A. The associated warning light should illuminate after 30 seconds.
B. The associated caution light should deactivate after a duration of 30 seconds.
C. The caution light, regardless of its position, should turn off within 30 seconds.
A. If a chapter is deleted by merging with other chapters, the original chapter title will be listed in the table of contents at the front of the manual and the location will be indicated in the reference materials.
B. Where chapters have been eliminatd through combining with other chapters, the original chapter title will be listed in the table of contents at the front of the manual,and the material will be located in the original chapter.
C. If a chapter is deleted by other chapters, the original chapter title will be listed in the table of contents at the front of the manual and the location will be indicated in the reference materials.
A. The function and operation of each unit in the system should be described. The location of the units shouldn’t be described.
B. The function, operation and location of each unit in the system should be deleted.
C. The function, operation and location of each unit in the system should be described.
A. The operational test of HFS-900D transceivers is an internal functions check of the HF transceiver and it is a BITE test.
B. The BITE test for the HFS-900D transceivers is the operation test that does the inner check of the HF transceiver.
C. The check of the internal functions of the HF transceiver is a BITE test related to HFS-900D transceivers.
A. Print all pages besides wiring diagrams and foldouts on both sides.
B. Print all pages other than wiring diagrams and foldouts on both sides.
C. Print all pages no more than wiring diagrams and foldouts on both sides.
A. Detection system will provide information about how to detect ice.
B. Detection system is utilized to find and display ice formation.
C. The detection information of ice is from the indication system.
