A、 The correction installation of the upper drag strut can prevent the retraction of the lower drag strut.
B、 If the upper drag strut is installed improperly, the lower one will be hit during retraction.
C、 The removal of the upper drag strut has to be done properly so that the lower one can fully extend.
答案：B
A、 The correction installation of the upper drag strut can prevent the retraction of the lower drag strut.
B、 If the upper drag strut is installed improperly, the lower one will be hit during retraction.
C、 The removal of the upper drag strut has to be done properly so that the lower one can fully extend.
答案：B
A. Each manufacturer is expected to reasonably abide by the Specification content and arrangement.
B. Each manufacturer is expected to reasonably agree with the Specification content and arrangement.
C. Each manufacturer is expected to reasonably substitute the Specification content and arrangement.
A. This is the maximum portion of flammable vapors in air. If the portion is bigger, when an ignition source touched the gas, it would cause the fire to be diffused.
B. This is the minimum volume of flammable vapors. If the volume is lower, when the gas contacted with an ignition source, the fire would not come out.
C. This is the minimum density of flammable vapors in air. If the density was lower, when an ignition source touched the gas, it would not cause the spread of flame.
A. Two controversial ways can be chosen to do the test, either with the Central Maintenance Computer System through a the MCDU, like you have probably learned already, and with a test switch on the VOR receiver in the avionics compartment.
B. You can do the test following procedures -- with the Central Maintenance Computer System by the MCDU, you have probably learned already, and with a test switch on the VOR receiver in the avionics compartment.
C. The test can be done in either way below-- using the Central Maintenance Computer System via the MCDU, as you have probably already learned, or using a test switch on the VOR receiver in the avionics compartment.
A. Ground service bus has no power, but the external power can be supplied.
B. Ground service bus is not energized with external power.
C. Ground service bus is power off when external power is supplied.
A. Do not perform any work to the aircraft during maintenance.
B. It is forbidden to refuel the aircraft during maintenance.
C. You can add fuel to the aircraft at any time.
A. The function of the portable water system is to store and send drinking water to the passengers.
B. The potable water system must keep and transfer the water to the toilet for washing only.
C. The purpose of the drinking water system is to store and deliver the water for drinking.
解析：解析：这道题考察的是客车的车钩采用的是什么装置。鞍式复原装置是用于铁路机车的一种装置，用于连接车辆。而客车的车钩通常采用的是自动钩挂装置或者其他类型的连接装置，因此新造客车的车钩不会采用鞍式复原装置，所以答案是错误。
生活中，我们可以通过类比来理解这个知识点。就好比我们平时乘坐的公交车或者地铁，车厢之间连接的部分通常是通过自动钩挂装置来连接的，而不是铁路机车上使用的鞍式复原装置。这样就更容易理解客车的车钩不会采用鞍式复原装置这个观点了。
A. Soak the element for two hours.
B. Wet the element for two hours.
C. Stove the element for two hours.
A. The items in the Emergency Procedures check list are determined to be essential in aid of the pilot in an emergency and should be limited to the minimum number.
B. A limited number of items in the Emergency Procedures check list are determined to be essential to aid the pilot in an emergency.
C. To aid the pilot in an emergency, it is determined that the Emergency Procedures check list should contain only essential items.
A. English is not often the mother language of the readers of technical files.
B. English is not often the private language of the readers of technical books.
C. English is not often the required language of the readers of technical pamphlet.
A. These tests should only use the equipment or facilities installed on the aircraft. These tests should be able to perform by the flight crews.
B. These tests should not use the special equipment or facilities that are not installed on the aircraft. These tests should be similar to the tests performed by the flight crews.
C. These tests should require the equipment or facilities installed on the aircraft rather than the special ones and should be replaceable by the tests accomplished by the flight crews.
