A.4%; B.6%; C.8%; D.10%
A.評價汽車的動力性能; B.克服離心力保證行車安全; C.評價燃料消耗經(jīng)濟(jì)性; D.確定汽車爬坡采用哪一排檔
A.20m; B.10m; C.50m