试题与答案

(1)古代铜币表面绿色铜锈的主要成分是Cu2(OH)2CO3,,文物鉴定人员常用

题型:填空题

题目:

(1)古代铜币表面绿色铜锈的主要成分是Cu2(OH)2CO3,,文物鉴定人员常用酸验法鉴别铜锈真伪;用细玻璃棒蘸取少许稀盐酸,涂擦在需要鉴别可疑铜锈的部位,若有气泡产生则初定为铜锈,反应的化学方程式为______.

(2)某厂采用联合法生产硫酸铜、硫酸亚铁作饲料添加剂,主要步骤如下图所示:

写出上图中①、③反应的化学方程式:

①______;

③______;______.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析: SPOOLing英文为:Simutaneous Peripheral Operations On-Line(同时的外围设备联机操作)。它是一种虚拟设备技术,其核心思想是在一台共享设备(通常是高速、大容量磁盘)上模拟独占设备的操作...

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B.we should look up every word in the dictionary

C.we need to put every word into our own

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B.the order of words can never change the meaning of an English sentence

C.sometimes different order of words has a different meaning

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B.is different from “Only she likes apples. ”

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