×
单选题
819、纵桁和上翼面蒙皮构成通风通道。通风通道在中央油箱内有排放浮子活门
A
Stringers and the upper wing skin make the vent channels. The vent channels have drain float valves in the center tank.
B
Stringers and the upper wing skin are called vent channels, The vent channels go through drain float valves in the center tank.
C
Stringers and the upper wing skin are compose of the vent channels,The vent channels got exhaust float valves from the center tank.
答案解析
正确答案：A
相关题目
单选题
730 根据制造商的选择,静压系统的描述和讨论可以结合第7.49段的皮托管压力系统。
单选题
729 Make sure that there is tension in the lockwire.
单选题
728 丰B从 Identify the component with a code to help you to install it again correctly.
单选题
727 在STE中,不允许使用小写字母的单词。
单选题
726 The function and operation of each unit in the system should be described as well as the location of the units
单选题
725 This is the minimum concentration of flammable vapors in air below which propagation of flame does no t occur on contact with a source of ignition
单选题
724 Install the larger bolts.
单选题
723 然而,制造商可能会省略不适用于该产品的系统章,或者在可行的情况下合并系统/章
单选题
722 外径必须与内径同轴。
单选题
721 当液压系统B的发动机驱动泵压力低于正常时,液压动力转换组件系统为前缘襟翼和缝翼提供备用液压
