【单选题】【消耗次数：1】
结缔组织的结构特点是（）
①
细胞种类多，细胞间质少
②
来源于三个胚层
③
细胞间质多而无纤维
④
细胞种类多，无极性，分散在细胞间质内
⑤
细胞密集而细胞间质少
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软骨细胞和成骨细胞的相同超微结构特点是（）
①
溶酶体多
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滑面内质网丰富和高尔基复合体发达
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溶酶体和线粒体多
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粗面内质网丰富和高尔基复合体发达
⑤
滑面内质网丰富和溶酶体多
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