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THE POSSIBLE OPENING POSITIONS FOR THE FAN COWL DOORS ARE：

AOne at 55 degrees for an increased access.

BIt depends on the speed of the wind.

COne at 40 degrees for routine maintenance and a second at 55 degrees for increased access.

DOne at 40 degrees for an increased access.

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正确答案：A （备注：此答案有误）

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