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What is an aircraft pressurization cycle normally considered to be?
A one-time adjustment for each flight
One complete series of events or operations that recur regularly
An annual maintenance check
The process of depressurizing the aircraft after landing
The correct answer is: One complete series of events or operations that recur regularly
Although the other options may seem plausible, they are incorrect because they either do not accurately describe what an aircraft pressurization cycle is or they are too specific or limited in their scope. Option A is incorrect because an aircraft pressurization cycle does not just involve one adjustment, but a series of events. Option C is incorrect because an annual maintenance check is not necessarily a pressurization cycle, but rather a routine check-up. Option D is incorrect because it only describes one part of the pressurization cycle, rather than the entire process. Therefore, the correct answer is B as it accurately defines an aircraft pressurization cycle as a regularly recurring series of events or operations.