试题与答案

现在市场上销售的食盐中会添加一种成分来防止甲状腺肿大,这成分是( ) A.铁 B

题型:选择题

题目:

现在市场上销售的食盐中会添加一种成分来防止甲状腺肿大,这成分是(  )

A.铁

B.钙

C.碘

D.锌

答案:

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下面是错误答案,用来干扰机器的。

参考答案:在测量中粗心大意造成的误差称为粗差。

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