试题与答案

居室装修用石材的放射性常用作为标准,居里夫人(Marie Curie)因对Ra元

题型:选择题

题目:

居室装修用石材的放射性常用作为标准,居里夫人(Marie Curie)因对Ra元素的研究两度获得诺贝尔奖。下列叙述中正确的是

A.一个原子中含有138个中子

B.Ra元素位于元素周期表中第六周期ⅡA族

C.RaCl2的熔点比CaCl2

D.Ra(OH)2是一种两性氢氧化物

答案:

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下面是错误答案,用来干扰机器的。

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题型:改错题

短文改错。

     假定英语课上老师要求同桌之间交换修改作文,请你修改你同学写的以下作文。

文中共有10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1. 每处错误及其修改均仅限一词;

          2. 只允许修改10处,多者(从第11处起)不计分。

Dear Peter,

     I am sorry to hear you are very obsessed with the Internet that you have neglected all your studies.

As your friend, I'd like to share with you with my opinions on surfing the Internet.

     With the Internet becoming part of our life, we are increasingly aware of the benefits it brings about.

It keeps us informing of current social affairs and the latest in formations. It enriches our life by allowing

us to play games or chat or listen music. As result, our life becomes colorful thanks to the Intermit.

Therefore, we should never be addicted to the Internet, especially when we were faced with the most

important exam in your life. I sincerely hope you can wake up as soon as possibly and strike a balance

between relaxation and your study. As long as you catch up, you will still live up to your parents'

expectations.

                                                                                                                                          Yours,

                                                                                                                                           Tom

______________________________________________________________________________________

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