How fit are your teeth? Are you lazy about brushing them? Never fear: An inventor is on the case. An electric toothbrush senses （感觉） how long and how well you brush, and it lets you track（跟踪） your performance on your phone.
The Kolibree toothbrush was exhibited at the International Consumer Electronics Show in Las Vegas this week. It senses how it is moved and can send the information to an Android phone or iPhone via a Bluetooth wireless （无线的） connection.
The toothbrush will be able to teach you to brush right (don’t forget the insides of the teeth!) and make sure you’re brushing long enough. “It’s kind of like having a dentist actually watch your brushing on a day-to-day basis,” says Thomas Serval, the French inventor.
The toothbrush will also be able to talk to other applications （设备）on your phone, so developers could, for example, create a game controlled by your toothbrush. You could score points for beating monsters among your teeth. “We try to make it smart and fun,” Serval says.
Serval says he was inspired by his experience as a father. He would come home from work and ask his kids if they had brushed their teeth. They said “yes,” but Serval would find their toothbrush heads dry. He decided he needed a brush that really told him how well his children brushed.
The company says the Kolibree will go on sale this summer, from $99 to $199, and the U.S. is the first target market. ( 目标市场)All of the following statements are wrong except ____________.
| A．It can sense how users brush their teeth. |
| B．It can track users’ school performance. |
| C．It can check users’ fear of seeing a dentist. |
| D．It can help users find their phones. |
What can we learn from Serval’s words in Paragraph 3?
| A．You will find it enjoyable to see a dentist. |
| B．You should see your dentist on a day-to –day basis. |
| C．You can brush with the Kolibree as if guided by a dentist. |
| D．You’d like a dentist to watch you brush your teeth every day. |
What can we infer about Serval’s children?
| A．They were unwilling to brush their teeth |
| B．They often failed to clean their toothbrushes. |
| C．They preferred to use a toothbrush with a dry head. |
| D．They liked brushing their teeth after Serval came home. |
When you want to see if a library has the book you want, you can use the catalogue(目录) in the Library. Most catalogues of books in a library take the form of small cards kept in boxes. One way of arranging (排列) the cards is in ABC order by the family names of the writers.
Catalogue cards usually give the following important information: (1 )the name of the writer, (2)the shelf-n k(架号) ,that is ,the Dewev number which helps people to find where the books are, (3) the title of the book, (4)the year of publication and the publisher, and (5)the number of pages in the book.
1．if you know the title of a book and want to find out if it is in the catalogue, what else do you need to know?
A. The shelf-mark. B. The name of the writer.
C. The Dewey number. D. The year of publication.
2. Which of the following is the kind of catalogue card described in the text?
A. 428.65 Brooks,J.and Grundy,P.Writing for Study PurposesCambridge University I ‘ns~(1954) 78pp
B. 783.25 The best bookfor writing practicePractical Writing (1965) 213pp
C.315.08 Reading Skills Beijing University Press (1990) 160pp
D.921 .87 Smith, J Practical ReachingThe People’s Publishing House (1989)
JINTAN,JTANGSU:The 20 students 18 boys and 2 girls — had a thousand reasons to be proud of themselves. They had just climbed their way to the top rung(阶梯) out of 4 million students taking part in the Fifth National Hua Luogeng Gold Cup Mathematics Contest (竞赛)Tuesday evening.
The 20 gold medal winners are all primary and middle school students under the age of 14.
‘Many of the problems are of college level and these pupils can figure them out. It is just unbelievable! ‘said a teacher from Guangdong province.
Named after China’ s most famous mathematician, Hua Luogeng, the contest started in 1986, one year after his death. In less than 10 years, it has been recognized by the State Education Commission (国家)as the country’s biggest and best contest of its kind.
1. This news story is mainly about .
A. when the contest started
B. how the contest got its name
C. the 20 pupils who have won gold medals in the contest
D. the 5th National Hua Luogeng Gold Cup Mathematics Contest
2. This news story most probably appeared in a news paper in .
A.1995 B. 1987 C. 1986 D. 1997
3 Ii can be inferred from the text that the teacher from Guangdong province .
A. felt proud of the gold medal winners
B. wondered if the students were honest
C. thought that the problems were too difficult for the students
D. believed that the twenty winners could go to study at university
4 The underlined phrase ‘figure out’ in the text means .
A .guess B. add up C. work out D. study
In the 19th century England people liked to go to the seaside. In those days, ladies wore long bathing dresses, and men wore bathing suits. Women did not walk about on the beach in their bathing dresses. They hired a bathing machine. A bathing machine was used for changing in, and for taking the bather down to the sea. It cost 2 pence to hire a machine and an attendant (f~ ~). When she had paid, the bather climbed up the back steps and got into the bathing machine. Then she changed into her bathing dress. When she had changed , the machine was pulled down to the sea. The bathing machine stopped in the water and the bather went down the front steps into the water. If she did not want to get into the sea, the attendant pulled her in.
1. Who used the bathing machine?
A. Women bathers.
B. Both men and women bathers.
C. Bathers who couldn’t swim.
D. Bathers who couldn’t walk.
2. A bathing machine was mainly used for
A. giving the bather a pleasure ride on the beach
B. giving the bather some exercise before getting into the water
C. protecting the bather from catching cold from the sea wind
D. protecting the bather from being seen in bathing dress out of water
3. In the 19th century people who used the bathing machine usually did the following things. Which is the right order for doing them?
a. Changing into bathing clothes
b. Getting out of the bathing machine
c. Paying 2 pence
d. Getting into the bathing machine
e. Being taken down the beach
f. Getting into the water
A. e,d,a,b,f,c B. c,d,a,e,b,f
C. c,d,e,a,b,f D. d,a,e,b,f,c
Annealing
Annealing is a way of making metal softer by heating it and then letting it cool very slowly, if metal is heated and then cooled very quickly, for example by dipping(浸) it in water, it will be very hard but also very brittle(脆)—that is, it will break easily. Metal that has been annealed is soft but does not breaks as easily. It is possible to make metal as hard or as soft as is wished, by annealing it. The metal is heated, and allowed to cool slowly for a certain length of time. The longer the heated metal takes to cool slowly, the softer it becomes. Annealing can also be used on other material, such as glass.
1. Annealing can make metal ____
A. hard and tough(韧) B. hard but brittle C. soft but tough D. soft and brittle
2. Why do people put hot metal in water?
A. To make it hard. B. To make it soft. C. To make it cool. D. To make it brittle
3. In annealing, the required hardness of a metal depends on ______
A. the quantity of water used B. the temperature of the metal
C. the softness of the metal D. the timing of the operation
4. As suggested by the text, how can glass be made less brittle?
A. It can be heated and then cooled quickly.
B. It can be cooled and then heated slowly.
C. It can be heated and then cooled slowly.
D. It can be cooled and then heated quickly.
When several different people look at the same person, it is not unusual for each of them to see different things; when you alone observe one behavior or one person at two different times, you may see different things. The following are but some of the factors that lead to these varying perceptions（感知，感觉）: 
Each person's perceptions of others are formed by his or her own cultural conditioning, education, and personal experience.
Sometimes perceptions differ because of what we choose to observe and how we deal with what we've observed. It is not necessarily true that person's perception is based on observations of a particular person. Your observations may be totally controlled by some. Your observations may be totally controlled by what others have told you about this person; or you may focus primarily on the situation or role relationship. Most people do not use the same yardstick（尺码） to measure their parents, their friends, and strangers.
Sometimes we see only what we want to see what may be obverse（正面的）to others because of our own needs, desires, or temporary（临时的） emotional states. This is a process known as selective perception. Selective perception is obviously more difficult when contradictory（相反的） information is particularly obvious, but it can be done. We can ignore the stimulus（刺激）-"He's basically a good boy, so what I saw was not shoplifting（入店行窃）." We can reduce the importance of the contradictory information -"All kids get into mischief（顽皮）. Taking a book from the bookstore isn't such a big deal." We call change the meaning of the contradictory information-"It wasn't shoplifting because he was going to pay for it later."...
| 1． |
Why might the observation of the same person by two people at the same time differ?
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| 2． |
According the passage, our perceptions are formed by ________.
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| 3． |
From the passage, we know _____ causes us to think a boy's shoplifting isn't serious.
|
| 4． |
What does the passage mainly talk about?
|