export function apply(Fn, obj, args){
    //判断
    if(obj === undefined || obj === null){
        obj = globalThis;
    }
    //为 obj 添加临时方法
    obj.temp = Fn;
    //执行方法
    let result = obj.temp(...args);
    //删除临时属性
    delete obj.temp;
    //返回结果
    return result;
}