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. 只要发现的问题得到彻底解决，就会向申请方颁发补充型号合格证。
B. 如果发现的问题得不到彻底解决，就不会向申请方颁发型号合格证。
C. 型号合格证的颁发与否取决于是否彻底解决了发现的问题。
A. 你可以根据单词在句子中的功能和意思了解它的位置，因为动词和形容词的位置不同。
B. 因为动词和形容词在句子中的位置不同，你可以根据单词的作用和意思来确定它的位置。
C. 单词在句子中的位置可以告诉你它的功能以及它的意思，因为动词和形容词有不同的位置。
A. Before drill the hole, make sure that the point of the drill head is sharp.
B. Prior to drill the hole, make sure that the point of the drill bit is sharp.
C. Before you make the hole, make sure that the point of the drill bit is sharp.
A. The lower seal appears as the lower bearing is pulled down.
B. You can see the lower seal before pulling the lower bearing down.
C. Only after you pull the lower seal down can you see the lower bearing.
A. NOTE: The manufacturer may have the option of including wiring schematic in Chapter 24, Chapter 91, or establish a separate Wiring Diagram Manual.
B. NOTE: The manufacturer may have the option of including wiring schematic in Chapter 24, Chapter 91, or establish a separate Wiring Schematic Manual.
C. NOTE: The manufacturer may have the option of including wiring diagrams in Chapter 24, Chapter 91, or establish a separate Wiring Diagram Manual.
A. The pneumatic system gets compressed air from the pneumatic air sources and supplies the compressed air through ducts to the user systems.
B. The pneumatic system gets compressed air from the pneumatic air sources and supplies the compressed air through manifold to the user systems.
C. The pneumatic system gets comprised air from the pneumatic air sources and supplies comprised the air through ducts to the user systems.
A. 绕其轴线旋转此曲柄。
B. 绕其圆心旋转此杆。
C. 绕其轴线旋转此轴。
A. Quickly move the throttle to the middle position.
B. Move the throttle quickly to the idle position.
C. Push the throttle quickly to the neutral position.
A. 移除剩下的液体后向管子吹气。
B. 通过吹气向管子添加剩余的液体。
C. 通过向管子吹气移除剩下的液体。
A. 这部分系统被用来控制空气中的湿度，控制臭氧含量，从空调空气中去除放射性污染物，并对空气应用除氧剂、净化器等。
B. 系统的这个部分被用于控制空气中的颗粒，控制区域聚集度，过滤空调空气中活跃的无线电波，并在合适的时候对空气用除氧剂和杀虫剂等处理。
C. 系统的这部分被用于控制空气中的水分，控制臭氧浓度，过滤空调空气中的放射性碎屑，并在适用时使用除臭剂、杀虫剂等处理空气。
