问题 完形填空

阅读表达

Here is something about Peter’s family. There are five people in his family. They are his father, his mother, his grandfather, his sister Kate and him. His father, Mr Brown, is a doctor.(1) _____ is thirty. Peter’s (2)_____, Mrs Brown, is a teacher. She is thirty too. Peter and his sister study in their mother’s school. Peter is in Class Two, Grade Eight. Kate is in Class Two, Grade Seven. (3)They go to school at 6:30 in the morning. Look! That old man is Peter’s grandfather. He is very old. He walks his dog every morning. Where is Kate? Look! She is under that big tree.

小题1:在(1)(2)处填入合适的词或短语使句子完整。_________,  ________

小题2:回答问题: Where do Kate and Peter study?

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小题3:将(3)句译成中文。

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小题4:在文中找出He takes his dog for a walk every morning.的同义句。

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小题5:找出或写出本文的主题句。

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答案

小题1:he/ mother

小题2:They study in their mother’s school.

小题3:他们每天早上6.30上学。

小题4:He walks his dog every morning.

小题5:Here is something about Peter’s family.

题目分析:

小题1:根据前面His father, Mr Brown, is a doctor可知,本处应该用he来代替his father;根据上文以及下文的Mrs Brown可知,本处是指他的妈妈,故填mother。

小题2:根据 Peter and his sister study in their mother’s school. 可知,彼得和他的妹妹在他们妈妈的学校学习。故填They study in their mother’s school.

小题3:in the morning是“在早上”,go to school“去上学”故本句翻译成他们每天早上6.30上学。

小题4:He takes his dog for a walk every morning一句的意思是“每天早上,他都带他的狗去散步。”文中的同义句应是He walks his dog every morning.

小题5:本文从各个方面对彼得的一家进行了描述,所以文章的开头一句就是对全文的综述,故填Here is something about Peter’s family.

点评:完成本题需要先弄清文章的意思,再根据要求来完成题目。本题中的题目第2小题比较简单,而其他题相对较难,不是直接找答案的题目,特别是翻译句子,应注意句式的结构,翻译时应符合习惯表达

填空题

(16分)在离子晶体中,阴阳离子按一定规律在空间排列,如图(1)所示即是NaCl的晶体结构,这两种离子在空间三个互相垂直的方向上都是等距离排列的。                                               

①在晶体中,每个Na+离子周围与它最接近的、且距离相等的Cl-共有        个。

每个Na+离子周围与它最接近的、且距离相等的Na+共有         个。而Na+离子数目与Cl-离子数目之比为             

②在离子晶体中,阴阳离子具有球对称的电子云。它们可以被看成是不等径的刚性圆球,并彼此相切(如图⑵所示)。离子键的键长是相邻阴阳离子的半径之和(如图⑶所示),已知a为常数。

 
                                            

                                          a

(1)                              (2)                 (3)

③试回答下列问题:

NaCl晶体中离子键的键长为                     。Na+离子半径与Cl-离子

半径比r+/r- =           。(已知√2="1.414" , √3="1.732,  " √5=2.236)

④NaCl晶体中不存在分子,但在温度达到1413℃时,NaCl晶体形成气体,并以分子形式存在,现有29.25gNaCl晶体,强热使温度达到1450℃,测得气体体积为5.6L(已折算为标准状况),则此时氯化钠气体的分子式为                      

⑤纳米材料的表面原子占总原子数的比例极大,这是它具有许多特殊性质的原因,假设某氯化钠纳米颗粒的大小和形状恰好等于氯化钠晶胞的大小和形状,则这种纳米颗粒的表面原子占总原子数的百分数为                 

名词解释