function App() {
return (
<Router >
<NavBar/>
<Routes>
<Route path="/" element={<HomePage />}/>
<Route exact path="/about-us" element={<About />} />
<Route exact path="/admin" element = {<Admin/>}/>
</Routes>
<Footer/>
</Router>
);
}
export default App;
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如何在反应中将主页的页眉和页脚与管理页面中的显示分开?