【单选题】【消耗次数：1】
用琼脂扩散试验检测鸡法氏囊抗体,1%琼脂中NacI的含量比例是（%）
①
8
②
12
③
4
④
16
参考答案：
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关于琼脂印膜材料，下列说法错误的为()
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琼脂印膜材料具有反复使用的特点，临床常用作复制模型的印膜材料
②
琼脂作为印膜材料是利用其凝胶和溶胶之间的转化
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琼脂印膜材料的凝胶转变为溶胶的温度介于50～60℃之间
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