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20.Though"nanometer"(纳米) is now a fashionable term all over the world,few people know exactly what it is.It has become a new favorite of manufacturers and sellers in recent years.Many"high-tech"products bearing the name"nano"have entered the market,bringing more mysterious feeling to surprised consumers.
Nanometer is a very small length unit of measure,and is very small.One millimeter is 1000micrometers,and one micrometer is 1000nanometers.That is,one nanometer is one billionth of a meter.Nano materials are solid materials composed of particles(粒子) or crystallites(晶体) of less than 100nanometer in size.Then,is a cup made of nano material really any different from an ordinary cup in function as far as how it works?
Are nano cups really so wonderful?A reporter went to the Institute of Nanomedicine,which is the first such institute of such a sort in the world and the only one in China,specializing in researching the investigation of the application of nano technology into medicine.
A water molecule(分子) is composed of 2hydrogen atoms and 1oxygen atom.It can be changed only by special working skillfully of the atoms.The material making up the cup can have nanometer particles.But it cannot change the chemical and physical propertiesof the water contained in it.The water in the cup is still water.When people drink it,it will produce no special effect on human body.
Professor Ji who worked in the Instiute of Nanomedicine told the reporter,so far,the investigation of nano materials is still limited in the laboratory.No commercial micro products can be produced yet.With the present level of science and technology,the time of everyday goods made of nanometer materials is still years away.
The products labeled with nano marks in the market now are only traditional products coated with a thin layer of nanometer material,which makes them more abrasion resistant(耐磨),much easier to be cleaned,or oil resisting or moth proof(防蛀).
Professor Ji explained that nano cup is a real cup.It can also be included in the list of nano products in a certain sense.But the nano cup has not changed its property and function as a cup.It is not a magical medicine for curing and health care.

67.Which of the following shows the right relationship?A
A.nanometer<micrometer<millimeter<meter
B.micrometer<millimeter<nanometer<meter
C.nanometer<millimeter<micrometer<meter
D.millimeter<micrometer<nanometer<meter
68.It can be inferred from the passage thatD.
A.real nano products are being produced by some companies
B.nano materials have been put into use in daily goods
C.the nano cup is very effective in curing and health care
D.real nano products haven't become available for people
69.The underlined word"properties"in the fourth paragraph probably meansC.
A.possessions   B.reactions   C.qualities  D.symbols
70.What would be the best title for the passage?B
A.High-tech Products        B.Nano Materials
C.High-teach Research       D.Nano Cups.

分析 本文是一篇科教类阅读,主要介绍了什么是纳米材料及其目前的研究进展.

解答 67-70 ADCB
67题答案:A考查细节推理,根据原文第二段One millimeter is 1000micrometers,and one micrometer is 1000nanometers.可知本题答案为A选项.
68题答案:D考查细节推理,根据原文第四段的With the present level of science and technology,the time of everyday goods made of nanometer materials is still years away.由于目前科学技术的局限,用纳米材料制造日常用品的时代还很远.可知本题答案为D选项.
69题答案:C考查细节推理,根据后面的The water in the cup is still water.可知"纳米材料杯并未改变水的特征",故本题答案为C选项.
70题答案:B考查主旨大意,本文主要讲的是什么是纳米材料及其目前的研究进展;故本题答案为B选项.

点评 本文是一篇科教类阅读,题目涉及多道细节理解题,做题时结合原文和题目有针对 性找出相关语句进行仔细分析,结合选项选出正确答案.推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案.

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科目:高中英语 来源: 题型:阅读理解

9.We may all have had the embarrassing moment:Getting half-way through a story only to realize that we've told this exact tale before,to the person we're boring with it now.Why do we make such memory mistakes?
According to research published in Psychological Science,it may have to do with the way our brains process different types of memory.
Researchers Nigel Gopie,of the Rotman Research Institute in Toronto,and Colin Macleod,of the University of Waterloo,divided memory into two kinds.The first was source memory,or the ability to keep track of where information is coming from.The second was destination memory,or the ability to recall who we have given information to.
They found that source memory functions better than destination memory,in part because of the direction in which that information is travelling.
To study the differences between source and destination memory,the researchers did an experiment on 60university students,according to a New York Times report.The students were asked to associate 50random ( 随意的) facts with the faces of 50famous people.Half of the students"told"each fact to one of the faces,reading it aloud when the celebrity's picture appeared on a computer screen.The other half read each fact silently and saw a different celebrity picture afterward.
When later asked to recall which facts went with which faces,the students who were giving information out (destination memory) scored about 16percent lower on memory performance compared with the students receiving information (source memory).
The researchers concluded that out-going information was less associated with its environmental context (背景)----that is,the person----than was incoming information.
This makes sense given what is known about attention.A person who is giving information,even little facts,will devote some mental resources to thinking about what is being said.Because our attention is finite(有限的),we give less attention to the person we are giving information to.
After a second experiment with another group of 40students,the researchers concluded that self-focus is another factor that  undermines destination memory.
They asked half the students to continue giving out random information,while the other told things about themselves.This time around,those who were talking about themselves did 15percent worse than those giving random information.
"When you start telling these personal facts compared with non-self facts,suddenly destination memory goes down more,suggesting that it is the self-focus component (成分) that's reducing the memory,Gopie told Live Science.

66.The point of this article is toC.
A.give advice on how to improve memory
B.say what causes the memory to worsen
C.explain why we repeat stories to the same person
D.introduce different kinds of memories
67.Those who read each fact silently and saw a different celebrity picture afterwardA.
A.can memorize more information
B.have worse memory
C.are more likely to repeat stories
D.paid more attention to themselves
68.The person who is giving informationB.
A.may receive little facts
B.focuses more on what he is saying
C.has finite attention
D.says much attention to his own behavior
69.The underlined word"undermines"probably meansA.
A.weakens      B.benefits   
C.explains     D.supports
70.What did the scientists conclude from the second experiment?D
A.Destination memory is weaker than source memory.
B.Focusing attention on oneself leads to relatively poor source memory performance.
C.Associating personal experience with information helps people memorize better.
D.Self-focus is responsible for giving information twice or more to the same person.

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科目:高中英语 来源: 题型:短文改错

10.假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文.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.
As middle school student,not only should we acquire knowledge but also we should have good qualities.I think express our gratitude to people ho helped us is one of the good qualities we must have.Two years before,my classmate,Wang Wei ran into difficulty because his father is diagnosed with lung cancer.His father's illness added to his family's trouble,but Wang Wei was in danger dropping out of school.After learning about his bad situation,our head teacher gave him timely help by allowing him to continue his schooling with any tuition.With the help of the teacher and classmates,Wang had finished chool.Jst before this important exam he wrote us a letter expressing his sincerely thanks for all what we have done.

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