【单选题】【消耗次数：1】
克山病是由于缺乏( )。
①
钙
②
碘
③
氟
④
硒
参考答案：
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相关题目
【单选题】
佝偻病的发生是由于缺乏（ ）．
①
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②
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③
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④
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随机题目
【单选题】
某私企业主为其雇员在太平洋人寿保险公司购买了意外伤害险，约定如雇员在工作中因意外伤害致死，将向其家属给付死亡保险金。其中，保险人、投保人、被保险人和受益人依次为（）。
①
私企业主、私企业主、雇员和雇员家属。
②
雇员家属、太平洋人寿保险公司、雇员和私企业主。
③
太平洋人寿保险公司、私企业主、雇员和雇员家属。
④
雇员、私企业主、雇员家属和雇员家属。