A、 The temperature decreases - 0.00198°C per foot from sea level to the altitude at which the temperature is -56.5°C and zero above that altitude.
B、 The temperature gradient from sea level to the altitude at which the temperature is -56.5°C is - 0.00198°C per foot and zero above that altitude.
C、 The temperature drops 0.00198°C per foot from sea level to the altitude at which the temperature is -56.5°C and to zero above that altitude.
答案：B
A、 The temperature decreases - 0.00198°C per foot from sea level to the altitude at which the temperature is -56.5°C and zero above that altitude.
B、 The temperature gradient from sea level to the altitude at which the temperature is -56.5°C is - 0.00198°C per foot and zero above that altitude.
C、 The temperature drops 0.00198°C per foot from sea level to the altitude at which the temperature is -56.5°C and to zero above that altitude.
答案：B
A. 本程序指出，在飞机进行任何改装之前，应联系美国联邦航空局，以确保不违反飞机的适航性。
B. 本程序指出，在飞机进行任何改装之前，美国联邦航空局应与厂家确认其不违反飞机的适航性。
C. 本程序指出，在飞机进行任何改装之初，应联系美国联邦航空局，以确保飞机的适航性。
A. 辅助燃油箱通常是可移动的油箱。
B. 辅助燃油箱通常是可拆卸的油箱
C. 辅助燃油箱是常规的可拆卸的油箱。
A. Ensure that no other repairs are underway in the repair area before undertaking this procedure.
B. This procedure can only be done if there are other repairs in the repair area.
C. Only proceed with this procedure if there are concurrent repairs being carried out in the designated repair area.
A. 在表面放置一块透明塑料片。
B. 在外面放置一块复合材料薄片。
C. 将一块强化塑料置于部件表面。
A. When the cumulative revised pages (including back-up pages) exceeds 60% of the total pages of the manual, a reissue should be prepared.
B. If the updated pages, including back-up pages, were less than 60% of the total page of the manual, a new manual should be copied.
C. Up to 60% of total pages (including back-up pages) were accumulated by mistake, the manual should be rewritten.
A. 更换磨损超过最大限度的部件。
B. 更换部件，磨损已超过最小限度。
C. 拆卸元件，磨擦已超过最大限度。
A. 警告：关闭舱口前，确保机组休息室中没有人员。舱口关闭时，舱室没有气流，存在中毒的风险。
B. 警告：关闭舱门前，确保机组休息室中没有人员。舱口关闭时，舱室没有气流，存在窒息的风险。
C. 警告：关闭门栓前，确保机组休息室中没有人员。舱口关闭时，舱室没有气流，存在缺氧的风险。
A. 在测试中，要灵活调整工作步骤的顺序。
B. 在测试中不要改变工作步骤的顺序。
C. 改变工作步骤的顺序在测试时是必要的。
A. 如果错差超过3度，则要改装指南针。
B. 如果误差超过3度，则要校准罗盘。
C. 如果角度超过3度，则要调整圆规。
A. This data sheet defines that the product, published by the type certificate, satisfies the airworthiness necessities complying with the conditions and limitations.
B. The product, for which the type certificate was approved, should reach the airworthiness requirements within conditions and limitations stipulating by this data sheet.
C. This data sheet regulates conditions and limitations of the airworthiness demands that the product, which has the qualified type certificate, should fulfill.
