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interface Person { age: number; firstName: string; lastName?: string; } let @(10): @(16) = { age: 1800, firstName: "Santa", lastName: "Claus" };

interface Person { age: number; firstName: string; lastName?: string; } let kindPerson: Required<Person> = { age: 1800, firstName: "Santa", lastName: "Claus" };

不正确

点击 这里 再试一次。

正确！

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