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单选题
That portion of the system is used to eliminate or prevent the formation of ice on all airfoil surfaces.
A
Restrictions on use of cabin pressurization during Takeoff, landing, or in flight shall be noted
B
That portion of the system is used to de-ice all airfoil surfaces once ice is formed.
C
All airfoil surfaces are equipped with that portion of the system to stop ice formation.
答案解析
正确答案：B
相关知识点：
系统防冰功能相关考点
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