American researchers found females are the more talkative sex because of a special “language protein(蛋白质)” in the brain.
The study, conducted by neuroscientists （神经学家）and psychologist from the University of Maryland, concluded that women talked more because they had more of the Foxp2 protein. The research, published in the Journal of Neuroscience, found that higher levels were found among humans that were women but in rats that were males. Their findings came after it was previously claimed that ladies speak about 20,000 words a day – over 13,000 more than men. “This study is one of the first to report a sex difference in the expression of a language-associated protein in humans or animals,” said Prof Margaret McCarthy, who led the study. In their study, the researchers attempted to determine what might make male rats more vocal than their female friends.
They separated four-day-old rats from their mothers and then counted the number of times they cried out in the “ultrasonic range”, the frequencies higher than humans can hear, over five minutes. While both sexes called out hundreds of cries, the males called out twice as often, they found. But when the pups were returned to their mother’s cage, she fussed over her sons first. Tests conducted on the parts of the brain known to be associated with vocalcalls showed the male pups have up to twice as much Foxp2 protein as the females. The researchers then increased the production in the brains of female pups and reduced it in males. This led to the female rats crying out more often and their mothers showing more interest to them. In contrast, males became less “talkative”.
The researchers then tested samples from ten children, aged between three and five, which showed that females had up to 30 per cent more of the Foxp2 protein than males, in a brain area key to language in humans.
“Based on our observations, we assume higher levels of Foxp2 in girls and higher levels of Foxp2 in male rats is an indication that Foxp2 protein levels are associated with the more communicative sex,” said Prof McCarthy.
“Our results imply Foxp2 as a component of the neurobiological basis of sex differences in vocal communication in mammals. ”From the second paragraph, we can learn that ________.
| A．women always speak more words than men |
| B．men and male rats have low levels of language protein |
| C．women and male rats have similar levels of Foxp2 |
| D．McCarthy isn’t the first to find females more talkative |
The underlined phrase “fussed over” in the third paragraph probably means______.
| A．paid attention to | B．related to | C．put pressure on | D．counted on |
The researchers carried out the experiments on rats in order to _______.
| A．test which part of the brain is key to language in rats and humans |
| B．prove the levels of Foxp2 protein in humans and rats are different |
| C．determine the reason why female rats are more talkative than male rats |
| D．discover the association between Foxp2protein and vocal communication |
Which of the following can be the best title for the passage ?
| A．Tests on humans and rats |
| B．Why women are the talkative sex |
| C．Sex differences in Foxp2 protein |
| D．Foxp2 protein determines oral ability |
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1.How many reasons for going to college does the author mention in the text?
A. 2 B. 3 C. 4 D. 5
2.The author thinks you should choose the college that is .
A. well-equipped B. competitive C. suitable D. famous
3.What does the author advise you to do to pay the high cost of college ?
A. To ask the family for help. B. To make a study of financial courses.
C. To do research on the price of college D. To get to know how to ask for financial aid.
4.What’s the author’s purpose of writing this text.?
A. To suggest ways to prepare for college learning.
B. To help readers find the right college.
C. To make Johnson Review popular.
D. To introduce college life.
5.Where may the article be taken from?
A. A Journalist Book B. A Travel Book C. A Grammar Book D. An Advice Book
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.