单选题:4、汽车制动时,地面给车轮的制动力 F B 与车轮和地面之间的附着力 F A 的关系为( )。
A.
F B ﹤ F A
B.
F B ﹥ F A
C.
F B ≤F A
D.
F B ≥F A
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