— What kind of potato chips do you like?

— I like _______ ones because they are hard, dry and easily broken.[ ]

A. crispy      

B. sweet    

C. soft      

D. sour

某定位点接触线高度为5000mm，所处曲线半径为600m，设计拉出值为400mm，外轨超高为60mm，轨距1500mm。求该定位点接触线距线路中心的距离。