试题与答案

联锁的基本布骤是什么?

题型:问答题 简答题

题目:

联锁的基本布骤是什么?

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

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题型:填空题

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1、一个体重50Kg的健康人含铁2g,这2g铁在人体中不是以单质金属的形式存在,而是以Fe2+和Fe3+的形式存在。亚铁离子易被吸收,给贫血者补充铁时,应给予含亚铁离子的亚铁盐,如硫酸亚铁。服用维生素C,可使食物中的铁离子还原成亚铁离子,有利于铁的吸收。

2、在新生代的海水里有一种铁细菌,它们提取海水中的亚铁离子,利用酶为催化剂把它转变成它们的皮鞘(可以用Fe2O3来表示其中的铁),后来便沉积下来形成铁矿;该反应的另一种反应物是CO2,反应后CO2转变成有机物(用甲醛:CH2O表示)。

问题:

这两则科普信息分别介绍了人体内和海水中的亚铁离子与铁离子(或者铁的高价化合物)相互转化的事实、方法和途径。这说明亚铁离子具有___________性,铁离子具有___________性1、中的维生素C是_________ 剂,2、中的CO2__________ 剂。

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题型:阅读理解

阅读下列应用文及相关信息,并按照要求匹配信息。请在答题卡上将对应题号的相应选项字母涂黑。

以下是广告信息:

以下是与广告相关的读者来信。请匹配来信与它们所对应的广告。

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Gentleman,

The enclosed advertisement for your organization comes from the April issue of   Cosmopolitan. I am interested in doing volunteer work for abused children and would 1ike to    have your information booklet. My address is as follows:

6 Villa Maurice,

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Yours truly,

D. Gruber

小题2:                                                 January 15, 2006

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I am interested in writing adventure stories for children. Please send information on the    course you offer to the following address:

5481 Torrance Blvd,

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Yours faithfully,

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June 1, 2006

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