读《四渡赤水出奇兵》，对“乌江天险重飞渡”的“重”理解正确的一项是（ ）。
The car ______ at the present speed until it reaches the foot of the mountain at about nine o'clock tonight.
①学会尊重 ②学会关心 ③学会帮助 ④学会致富
