A、 Do not go beyond this speed or Mach number besides in steady air, and then be careful.
B、 Do not increase by this speed or Mach number unless in steady air, and be careful.
C、 Do not exceed this speed or Mach Number except in smooth air and then only with caution.
答案：C
A、 Do not go beyond this speed or Mach number besides in steady air, and then be careful.
B、 Do not increase by this speed or Mach number unless in steady air, and be careful.
C、 Do not exceed this speed or Mach Number except in smooth air and then only with caution.
答案：C
A. 拆下标签。
B. 去除灰尘。
C. 移除设备。
A. 这些测试可能需要额外的地面支持设备，应比操作测试更具体和详细。
B. 这些试验可能需要增加地面支持设备，应比操作测试更专业和详实。
C. 这些测试可能需要提供专门的地面支撑设备，应比功能试验更特殊和详细。
A. 一百三十二是的整数的一个例子。
B. 1 / 32是分数的一个例子。
C. 一分三十二秒是片段的长度示例。
A. The color of the bottom mark on the plate is amber.
B. You can see the red bottom mark on the board.
C. There is no color of the bottom mark on the board.
A. However, an “emergency” almost always entails a failure that requires to respond immediately and rapidly, for example, the situations that a total powerplant fails, the fire or smoke occurs, or the cabin are depressurized rapidly.
B. An “emergency” however, almost always causes a malfunction that requests immediate and rapid response, such as the whole powerplant failure, fire or smoke, or rapid cabin pressurization.
C. However, an “emergency” is often related to a failure that demands respond simultaneously, such as the complete failure of the powerplant, fire or smoke, or rapid cabin warming.
A. Those units means that they can prevent it from eroding.
B. Those units provide a method of deicing.
C. Those units provide a way to prevent the formation of ice.
A. 有两种可用的编号方法。对于拥有一系列复杂系统的飞机，建议使用完整的“系统/章节”索引方法。对于小飞机或相对不复杂的飞机，可用简化的索引方法。
B. 有两种可用的编号方法。对于拥有一系列复杂系统的飞机，建议使用完整的“系统/章节”索引方法。对于小飞机或相对不复杂的飞机，可在编写索引号时用缩写的方式。
C. 有两种可用的编号方法。对于拥有复杂系统矩阵的飞机，建议使用完整的“系统/章节”索引方法。对于小飞机或相对不复杂的飞机，可在编写索引号时用缩写的方式。
A. 螺柱的凹陷不得超过5mm。
B. 螺柱的突起不得超过5mm。
C. 螺纹的长度不得超过5mm。
A. Clean the surface to make sure that the sealing is satisfactory.
B. Clean surfaces to ensure the bonding as required.
C. Clean the surface to make sure that the bond is satisfactory.
A. When the required maintenance procedure is not very long and fairly simple, the above combination can be grouped under a title which is called maintenance practice.
B. When the required maintenance procedure is not lengthy and is relatively simple, a combination of the above may be grouped under one heading and called maintenance practices.
C. When the required maintenance procedures are not very long and comparatively simple, the above combinations can be bound under one subject, calling maintenance practices.
