早上好
我在survey.js上遇到了一个问题，我无法为我的问题设置默认值，我想要这个：

但我得到了这个

用这个代码：

questions: [
                {
                    name: "ph-avant",
                    type: "html",
                    html: "<img class='myImg' src='/Images/ParcMachine/Gaz/PartieAvant.jpg' />",
                },
                {
                    type: "panel",
                    title: "CONTROLE VISUEL",
                    startWithNewLine: scrW,
                    questions: [
                    {
                        name: "Avant",
                        type: "matrix",
                        isRequired: true,
                        isAllRowRequired: true,
                        defaultValue: "nc",
                        title: "Partie Avant",
                        columns: [
                            { value: "ok", text: "OK" },
                            { value: "ko", text: "NON OK" },
                            { value: "nc", text: "NON CONCERNE" }
                        ],
                        rows: [
                            { value: "Fourches", text: "Fourches", defaultValue: "nc" },
                            { value: "Phares", text: "Phare avant droit / gauche", defaultValue: "nc" },
                            { value: "Autres", text: "Mât / Pare brise / Essuie glace", defaultValue: "nc" },
                            { value: "Chaines", text: "Chaînes / Flexibles", defaultValue: "nc" },
                        ]
                    },
                        {
                            name: "obs_avant",
                            type: "comment",
                            title: "Observations",
                        }
                    ]
                },
            ]

我用了一个多小时尝试了很多东西，但即使是用chatGPT我也找不到让它工作的方法
先谢了