[
{
"type": "single",
"category": "HTML",
"question": "以下哪个标签用于定义段落？",
"options": ["A. ", "B.
", "C.
", "D.
"],
"answer": "A",
"explanation": " 标签定义文本段落。"
},
{
"type": "multi",
"category": "CSS",
"question": "以下哪些是盒模型属性？（多选）",
"options": ["A. margin", "B. padding", "C. border", "D. color"],
"answer": "A,B,C",
"explanation": "margin、padding、border 是盒模型的三部分。"
},
{
"type": "judge",
"category": "HTML",
"question": "HTML 是一种编程语言。",
"options": ["正确", "错误"],
"answer": "错误",
"explanation": "HTML 是标记语言，不是编程语言。"
},
{
"type": "fill",
"category": "JavaScript",
"question": "声明常量使用的关键字是 _______。",
"answer": "const",
"explanation": "ES6 使用 const 声明常量。"
}
]