A、 If there is a available service bulletin to correct the problem of moisture ingress into the connector cavity,the letter then will be useless.
B、 Refer to this letter to help mitigate moisture ingress into the connector cavity even if there is a available service bulletin to correct the problem.
C、 If there is a available service bulletin to correct the problem that moisture ingress into the connector cavity, the letter then will provide procedures .
答案：A
A、 If there is a available service bulletin to correct the problem of moisture ingress into the connector cavity,the letter then will be useless.
B、 Refer to this letter to help mitigate moisture ingress into the connector cavity even if there is a available service bulletin to correct the problem.
C、 If there is a available service bulletin to correct the problem that moisture ingress into the connector cavity, the letter then will provide procedures .
答案：A
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. It＇s not easy to install more than two washers for each bolt.
B. It is forbidden to install more than two washers for each bolt.
C. Installing one washer for each bolt is forbidden.
A. You must obtain medical help as soon as you can.
B. You must obtain medical help as more as you can.
C. You must obtain medical instructions as soon as you can.
解析：这道题目考察的是对英语句子的理解能力。正确答案是A选项：You must obtain medical help as soon as you can. 这句话的意思是“你必须尽快获得医疗帮助”。关键词是“medical aid”意思是“医疗援助”，所以正确的表达应该是“medical help”。
如果你选择B选项：You must obtain medical help as more as you can. 这句话是错误的，因为“more”是比较级，表示“更多”，在这个句子中并不合适。
如果你选择C选项：You must obtain medical instructions as soon as you can. 这句话也是错误的，因为题目中提到的是“medical aid”而不是“medical instructions”，所以这个选项也不符合题意。
A. Use the same hydraulic fluid to lubricate the engine and all auxiliary equipment.
B. The lubricant used on engine and all auxiliary equipment are identical.
C. The identical grease is used to lubricate the engine and all auxiliary equipment.
A. Make sure that there is something in the pipe.
B. Make sure that there is nothing in the pipe.
C. Make sure that blockage is in the pipe.
解析：这道题是关于管道检查的问题。要确保管道没有堵塞，意思就是要确保管道内部没有任何障碍物。所以正确答案是B选项：Make sure that there is nothing in the pipe。
举个生动的例子来帮助理解：想象一下你家的水槽堵了，水无法流出。这时候你需要检查管道，确保没有任何东西堵塞在里面，才能让水顺利流出。如果你检查后发现有东西堵在管道里，那就需要清理掉它，让水可以畅通无阻地流动。所以，确保管道没有任何东西，才能保证水流畅通。这也是为什么正确答案是B选项的原因。
A. Be careful when you put your hand onto printed circuit boards.
B. Be careful when you get close to printed circuit boards.
C. Be careful when you remove printed circuit boards.
A. The revision dates need to be displayed at each revision location.
B. The revision date needs to be displayed in an obvious place.
C. The revision date should be displayed on every revision page.
A. In any process, the velocity is not large.
B. Do not increase this speed in any operation.
C. In any operation, the speed can not be greater than this value.
A. Use a drill bit not less than 45 mm long.
B. Use a drill bit that has a maximum length of 45 mm.
C. The drill bit used is more than 45 mm.
A. If one or more blades are broken, make an entry in the engine logbook.
B. If one or more blades are in place , make an entry in the engine logbook.
C. If one or more blades are absent, make an entry in the engine logbook.
