【单选题】【消耗次数：1】
木楼板具有自重轻、吸热指数小、（）等优点。
①
构造简单
②
耐火性不高
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下列关于耐燃性和耐火性说法有误的一项是（ ）。
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耐燃性是指材料在火焰和高温作用下可否燃烧的性质
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耐火的材料不一定耐燃，耐燃的一般都耐火
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