题目：
苯甲酸和苯甲酸钠最适宜防腐条件为()
A．pH4以下
B．pH6以下
C．pH7以下
D．pH8以下
E．pHl0以下
答案：
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参考答案：A
苯甲酸和苯甲酸钠最适宜防腐条件为()A．pH4以下 B．pH6以下 C．pH7以下
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