【单选题】【消耗次数：1】
下面关于脂质体的叙述不正确的是（）。
①
脂质体因结构不同可分为单室脂质体和多室脂质体
②
脂质体是将药物包封于类脂质双分子层内而形成的超微型球体
③
脂质体结构与表面活性剂的胶束相似
④
脂质体相变温度的高低取决于磷脂的种类
⑤
脂质体由磷脂和胆固醇组成
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