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单选题
通过机翼防冰系统，哪些飞机表面是防冰的？ Which aircraft surfaces are anti-iced by the wing anti-ice system
A
只有左右机翼前缘Left and right wing leading edges only
B
左机翼，右机翼和升降舵前缘 Left wing, right wing,and elevator leading edges
C
发动机整流罩，左机翼和右机翼Engine cowls, left wing and right wing
D
机翼和探头 wings and probes
答案解析
正确答案：A
