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单选题
To prevent overheat damage to the wing leading edge, the engine bleed air is given maximum cooling during ground operations.
A
Prior to ground operations, maximum cooling of the engine bleed air is provided to avoid the overheat damage to the wing leading edge.
B
To keep the wing leading edge from overheat damage, the engine bleed air has a maximum cooling effect during ground operations.
C
While the aircraft is operating on the ground, the engine bleed air provides a best cooling to the wing leading edge to renovate the damage due to overheat.
答案解析
正确答案：B
