18:["$","div",null,{"className":"grid gap-4 lg:grid-cols-[minmax(0,1fr)_minmax(16rem,20rem)] lg:items-start lg:gap-6","children":[["$","article",null,{"className":"surface-card animate-enter px-3.5 py-5 shadow-card sm:px-7 sm:py-8","children":[["$","header",null,{"className":"mb-4 flex flex-wrap items-center gap-2 sm:mb-5","children":[["$","span",null,{"className":"chip","children":"【填空题】"}],["$","span",null,{"className":"text-xs tabular-nums text-muted-foreground sm:text-sm","children":"4 / 7"}]]}],["$","h1",null,{"className":"rich-html min-w-0 max-w-full break-words text-base leading-relaxed text-slate-800 break-words text-lg font-medium leading-relaxed tracking-tight text-foreground sm:text-xl sm:leading-relaxed","dangerouslySetInnerHTML":{"__html":"

汽车转弯理论轨迹方程为 $C=$ ____。

"}}],null,["$","div",null,{"className":"mt-6 border-t border-border pt-6 sm:mt-8 sm:pt-8","children":[["$","div",null,{"className":"rounded-xl bg-success-soft/80 px-4 py-3.5 ring-1 ring-success/15 sm:px-5 sm:py-4","children":[["$","h2",null,{"className":"text-xs font-medium tracking-wide text-success sm:text-sm","children":"参考答案"}],["$","p",null,{"className":"mt-1.5 min-w-0 break-words text-2xl font-semibold leading-none tracking-tight text-success sm:text-3xl","children":"暂无"}]]}],["$","section",null,{"className":"mt-5 sm:mt-6","children":[["$","h2",null,{"className":"mb-2.5 text-sm font-semibold text-foreground sm:mb-3 sm:text-base","children":"参考解析"}],["$","div",null,{"className":"min-w-0 break-words text-sm leading-relaxed text-slate-700 sm:text-base","children":["$","div",null,{"className":"rich-html min-w-0 max-w-full break-words text-base leading-relaxed text-slate-800","dangerouslySetInnerHTML":{"__html":"

$C=\\rho l$ 。

"}}]}]]}]]}]]}],["$","aside",null,{"aria-labelledby":"question-neighbors-heading","className":"surface-card animate-enter animate-enter-delay-1 p-4 lg:sticky lg:top-20 lg:max-h-[calc(100dvh-6rem)] lg:overflow-y-auto lg:p-5","children":[["$","div",null,{"className":"flex items-baseline justify-between gap-3","children":[["$","h2",null,{"id":"question-neighbors-heading","className":"text-base font-semibold text-foreground sm:text-lg","children":"同章更多题目"}],["$","p",null,{"className":"shrink-0 text-sm tabular-nums text-muted-foreground","children":[4,"/",7]}]]}],["$","ol",null,{"className":"mt-3 flex flex-col gap-1","children":["$L1a","$L1b","$L1c","$L1d","$L1e","$L1f","$L20"]}],"$L21"]}]]}]

汽车转弯理论轨迹方程为C=C=C=____。

参考答案

参考解析

汽车转弯理论轨迹方程为 $C=$ ____。