【单选题】【消耗次数：1】
某研究经7年追踪后，发现2000名乙型肝炎携带者中有70名发生肝细胞癌，而800名非携带者中有7名发生肝细胞癌。问携带者中发生肝细胞癌的相对危险度（RR）是：
①
44.4
②
40.0
③
10.0
④
4.0
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【多选题】
和肝细胞有关的是
①
肝细胞内糖原受胰岛素和胰高血糖素的调节
②
胞质内含嗜碱性团块
③
肝细胞之间有紧密连接、桥粒和缝隙连接
④
胞质呈嗜酸性
⑤
胞质内有大量粗面内质网
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