下列对铁描述正确的有（） A.铁参与血红蛋白、肌红蛋白和构成 _爱下问搜题

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问题多项选择题

下列对铁描述正确的有（）

A.铁参与血红蛋白、肌红蛋白和构成

B.铁在食品工业中可用作颜色改变剂

C.可用作营养强剂

D.铁缺乏易患贫血

答案

参考答案：A, B, C, D

阅读理解

阅读理解，判断正(√)误(×)。

Liu: Excuse me, is there a cinema near here?

Policeman: Yes, there is.

Liu: Where is the cinema, please?

Policeman: It's next to the hospital.

Liu: Is it far from here?

Policeman: No, it's not far.

Liu: Thank you.

Policeman: You're welcome.

( ) 1. There is a cinema near here.

( ) 2. The cinema is next to the library.

( ) 3. The hospital is not far from here.

( ) 4. The policeman doesn't tell Liu.

填空题

一般来说，加权平均预测法给予近期观察值以（）的权数。