【单选题】【消耗次数：1】
乙酰半胱胺酸的祛痰作用机制是
①
反射性增加呼吸道腺体分泌
②
通过恶心祛痰
③
裂解痰中粘多糖
④
降低粘液的粘滞性
⑤
使痰液中粘蛋白多肽链中二硫键断裂，降低痰粘稠度
参考答案：
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