1b:["$","div",null,{"className":"grid gap-4 lg:grid-cols-[minmax(0,1fr)_minmax(16rem,20rem)] lg:items-start lg:gap-6","children":[["$","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":"【判断题】"}],["$","span",null,{"className":"text-xs tabular-nums text-muted-foreground sm:text-sm","children":"1 / 6"}]]}],["$","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":"

三维情形下当 r 趋于无穷时速度势 φ 趋于常数。

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点源项 Q/(4πr) 趋于零（ $K7-16$ ）。

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三维情形下当 r 趋于无穷时速度势 φ 趋于常数。

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