【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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【单选题】
佝偻病的发生是由于缺乏（ ）．
①
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②
Normal 0 7.8 磅 0 2 false false false EN-US ZH-CN X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:普通表格; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.5pt; mso-bidi-font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:宋体; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-font-kerning:1.0pt;}维生素Ｂ
③
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④
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随机题目
【单选题】
下列关于尺寸起止符说法是正确的是（ ）。
①
在土建工程制图中，尺寸起止符号有箭头和短斜线两种
②
在土建工程制图中，尺寸起止符号只有箭头
③
在土建工程制图中，尺寸起止符号只有短斜线
④
在土建工程制图中，尺寸起止符号只能使用短斜线；
【单选题】
中共十四大明确提出，我国经济体制改革的目标是建立（ ）
①
社会主义有计划商品经济体制
②
社会主义市场经济体制
③
计划为主．市场为辅的经济体制
④
市场为主．计划为辅的经济体制