A、 Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. Center tanks are made up of the main wing structure.
B、 Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. These three tanks are made up of the main wing structure.
C、 Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. The primary wing structure consists of main tank 2 and center tank.
答案：B
A、 Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. Center tanks are made up of the main wing structure.
B、 Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. These three tanks are made up of the main wing structure.
C、 Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. The primary wing structure consists of main tank 2 and center tank.
答案：B
A. The accuracy of the adjustment can vary.
B. The accuracy of the adjustment can be fixed.
C. The precision of the adjustment can be prevented .
A. The gyroscope will become stable before less than 15 seconds.
B. The gyroscope will become stable for at least 15 seconds.
C. After about 15 seconds, the gyroscope will become stable.
解析：这道题考察的是陀螺仪（gyroscope）的稳定时间。选项A说陀螺仪会在15秒之前就变得稳定，这是错误的。选项B说陀螺仪会至少稳定15秒，这也是错误的。正确答案是选项C，大约在15秒之后，陀螺仪会变得稳定。
要理解这个知识点，我们可以通过一个生动的例子来帮助记忆。想象一下你手里拿着一个陀螺，当你旋转它时，一开始它可能会摇摆不定，但随着时间的推移，它会逐渐稳定下来。就像一个孩子在玩陀螺时，需要一些时间才能让陀螺保持稳定，陀螺仪也需要一定的时间来达到稳定状态。所以，记住在大约15秒后，陀螺仪会变得稳定。
A. To know what you want to say and to use the words that give the wanted meaning shall always be assured.
B. In order to express the meaning that you want, always make sure that you know what you want to say and you use the words.
C. Always make sure that you use what you want to say to express the words with the meaning that you want.
A. The function of the rules in this specification is to direct the revising of all materials that are contained in Maintenance Manuals prepared by manufacturers.
B. With respect to format, style and method of presenting for all materials which are contained in Maintenance Manuals prepared by manufacturers, you can refer to the rules that are included in this specification.
C. When presenting format, style and method for rules of this specification, all materials of Maintenance Manuals prepared by manufacturers shall be accorded with.
A. The counted time resets to 0 when the button is kept down for two seconds.
B. The total time resets to 0 when the button is held on for two seconds.
C. The remained time resets to 0 when the button is seen down for two seconds.
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. This organization was asked to look into the readability of maintenance documentation in the civil aviation industry and find a resolution to simplify the language used to write such documentation.
B. This organization was asked to research the legibility of maintenance documentation in the civil aviation industry and get a way to simplify the language used to write such documentation.
C. This organization was asked to study the readability of maintenance documentation in the civil aviation industry and find a method to single out the language used to write such documentation.
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. Write instructions in the infinite form.
B. Write instructions in the command form.
C. Write instructions in the appropriate form.
解析：这道题考察的是写指令时所使用的语态。命令形式是 imperative form，也就是我们通常说的命令形式或者指令形式。在英语中，命令形式通常用来表达命令、请求、建议等。所以正确答案是B。
举个例子来帮助你更好地理解：假如你要告诉别人如何制作一杯咖啡，你可能会说：“Boil water, add coffee grounds, pour hot water over the grounds, stir, and enjoy!” 这里的每个动词都是用的命令形式，因为你是在向别人发出指令，告诉他们应该怎么做。
A. If the clearance dimension is not accurate, adjust the clearance dimension between the extend proximity sensor [44A] and the target [45]. Some of the ducts in the air distribution system are wrapped with insulation material.
B. Adjust the clearance dimension between the extend proximity sensor [44A] and the target [45] in case of the clearance dimension is out of tolerance. Some of the ducts in the air distribution system are wrapped with non-conductive material .
C. Adjust the clearance dimension between the extend proximity sensor [44A] and the target [45] until the clearance dimension is out of range. Some of the ducts in the air distribution system are wrapped with compound material.
