.
“Human influenza viruses can survive and be infectious for several days when they are deposited on banknotes,” according to the latest study by Yves Thomas and his colleages in Switzerland. Scientists put different types of flu virus onto Swiss franc notes and found that they could survive from a few hours to more than a week. The results depended on the type of flu virus.
According to the study, Swiss-banknotes are mostly cotton covered by a nonporous resin(无孔树脂). Banknotes from other countries may be composed of different materials, and this could affect viral transmission. “Whether similar results would be obtained with banknotes from other countries and with different characteristics needs to be studied.” the authors wrote. In an interview with Reuters, Thomas said. “Our studies have convinced us that it is possible to catch the flu from banknotes, but the chances are very, very small and there is no cause for concern among the gneral population,” To be sure, many kinds of frequently touched surfaces could temporarily hide the flu virus. Broadly speaking, scientists consider the risk of transmission in this way to be low. Particularly if hand-washing and other hygiene measures are practiced.
Three things must happen for a flu virus to be transmitted from one person to another via money. First, a person who is infected with the flu virus must sneeze or cough onto the banknote. Next, an uninfected person would need to touch the money while the virus si still present. Finally, that person would need to put his hand in his mouth or pick his nose, says Thomas. The best defense against infection: follow public health guidelines and wash your hands frequently.
49. What does the underlined word “this” refers to in the second paragraph?
A. The time when people stay in a bank.
B. The fact that banknotes may consist of deferent materials.
C. The bank where people draw their money.
D. The country where the banknotes are in circlation.
50. From the last paragraph, we can know that an infected person should ________.
A. pay attention to his personal hygiene B. wash his hands after leaving a bank
C. be monitored at a bank D. not cough at a bank
51. What can we learn from the passage?
A. Any person who touches banknotes will become infected.
B. Different flu viruses stay on the surface of banknotes for different lengths of time.
C. The bank should not allow any infected person to enter.
D. Only banknotes in Switzerland can transmit the flu virus.
52. What is the best title for the passage?
A. Is it Dangerous to Stay in a Bank?
B. How to Avoid Being Infected with the Flu Virus?
C. Can You Catch the Flu from Handling Money?
D. Why Do People Refuse to Use Banknotes in Switzerland?
Farmers can produce more by planting several different crops in the same field.But their success depends on which crops they plant together and how they mix (混合) them in the filed.In the past, the only way the farmers could learn which crops grow best together is to plant them and wait for the results.Now, however, a computer can give them answers.A new computer program written by Dr John Vanderwell of Michigan University can tell a farmer which plants grow well together and which do not.It can tell him how to plant the different crops; if he should plant each in a separate row, or mix the crops in the same row.It can tell the farmer how changes in planting each of the crops will affect the production of all of them.And it can tell him which plants can help reduce losses (损失) from diseases.Which of the following best gives the main idea of the passage?
| A．Computer helps find the best program for mixing plants. |
| B．Computer helps produce more crops. |
| C．Computer helps protect against insects and diseases. |
| D．Computer helps grow different plants. |
According to the passage, to get the best result, one needs to choose carefully ________.
| A．the kinds of crops to be planted together |
| B．the way for different crops to be mixed |
| C．both A and B |
| D．either A or B |
It seems the new computer program can NOT tell us ________.
| A．whether we should grow cotton and tomato together |
| B．how we should plant cotton and tomato together |
| C．what will happen if we grow potato, instead of tomato, together with cotton |
| D．how we can grow rice in the tomato field |
The new computer program seems most useful in saving us ________.
| A．man power | B．seeds | C．time | D．land |
Which of the following is NOT true?
| A．Computers can tell farmers how many plants can grow together. |
| B．With the help of computers farmers don't have to do a lot of work. |
| C．With the help of computers farmers can get better results. |
| D．The change of one plant may cause a change in production. |
Before she appeared on the reality show (真人秀) Britain's Got Talent, Susan Boyle was just an ordinary middleaged British woman.Now all this is going to change.
She lives in a house with her cat Pebbles in a tiny Scottish town.Because of learning difficulties, she doesn't have much education.But what she does have is a very good voice.As a kid, she sang in church and choirs and school plays.For a living, she sang at local pubs.
When she took the stage on April 10th her hair was untidy and her clothes seemed just_one_step_up_from rags.The audience laughed at her.
But then she opened her mouth.A few bars into the song and the laughing audience went silent.A beautiful voice was singing I Dreamed a Dream from the musical Les Miserables.Everyone was amazed.At the end of her song, the audience jumped to their feet and applauded wildly.
Almost overnight, Susan became a household name.She won fans and millions of admirers.Her online videos have drawn over 85.2 million hits.
Susan's story proved the truth of an old saying: “Never judge the book by its cover.” Susan may look ordinary, and doesn't have much dress sense, but she can certainly sing.
Susan's fans admire her courage, as much as they do her voice.She has experienced mockery and many disappointments, but her love for music has kept her going, which is worth anyone's respect.According to the passage, Susan Boyle ________.
| A．is a famous young actress | B．became famous after a show |
| C．used to be a good student | D．is good at dancing and has millions of admirers |
The underlined phrase “just one step up from” in the third paragraph probably means ________.
| A．far from | B．close to | C．different from | D．the same as |
The audience jumped and applauded wildly because ________.
| A．her hair was untidy and her clothes seemed just one step up from rags |
| B．she looked very funny |
| C．she sang so well that everyone was amazed |
| D．she made a foolish mistake in the end |
Susan Boyle has many fans now because of ________.
| A．her beautiful face | B．her knowing how to dress |
| C．her good education | D．her beautiful voice and courage |
The passage is mainly about ________.
| A．how to win fans | B．how to sing well |
| C．a woman's sudden success | D．a woman's simple life |
“Lizzie, there’s a letter for you!” Emily called up the stairs to her sister. Elizabeth looked down. “Is it from Harvard? They refused my application once.” Emily answered, “No, it’s from Yale.” Quickly, Elizabeth walked downstairs. She took the letter and opened it. “Rejected again,” Elizabeth said unhappily. “Who says women can’t be doctors?”
“They are fools not to accept you. You can’t let them stop you, Lizzie,” Emily said.
“I won’t. I’ll apply to (申请) Geneva Medical College,” Elizabeth told her sister. As it turned out, the professors at Geneva Medical College were not fools. They allowed Elizabeth Blackwell to study medicine.
In 1848, a year before Elizabeth would graduate, a typhoid epidemic (伤寒流行病) broke out in New York. Elizabeth wrote to Emily. “There’s an outbreak (爆发) of typhoid, and I am going to help. It is dangerous, so if I should not survive, please do me the honor of studying medicine yourself.”
Emily replied, “Encouraged by your dream and success, I have decided to study in medical school, as well.”
Having survived the disease, Elizabeth tried to set up a private medical practice. “I graduated first in my class but no one believes a woman can be a good doctor,” she said to Emily one day. “All I hear is that doctors should be men, while women should stay home to cook and clean.”
Emily said worriedly, “I will graduate in June with my medical degree. What shall we do?” Elizabeth thought for a while and replied, “There’s a big house in the poor part of our town. We can practice medicine there for people who couldn’t afford care.”
Soon with the help of some friends, Elizabeth and Emily bought the house and opened a hospital for poor women and children. “We’ll have an all-women staff (员工),” Elizabeth said. “And later, we’ll add a medical college for women!” Emily added. At last, Elizabeth realized her dream of being a doctor. The underlined word “Rejected” in the first paragraph can be best replaced by _____.
| A．Refused | B．Praised | C．Changed | D．Accepted |
Hearing Elizabeth’s words about the letter from Yale, Emily felt _____.
| A．excited | B．calm | C．satisfied | D．angry |
In 1848, Elizabeth wrote to Emily to _____.
| A．persuade Emily to come to help the sick | B．ask Emily to study medicine if she died |
| C．warn Emily the danger of typhoid epidemic | D．tell Emily she would graduate from college |
We can learn from the text that Elizabeth _____.
| A．received strong support from her sister | B．refused to go to study at Yale University |
| C．founded a medical college after graduation | D．was finally accepted by Harvard after her efforts |
Which of the following can best be used to describe Elizabeth?
| A．Humorous. | B．Honest. | C．Determined. | D．Careful. |
Johann Gutenberg, who worked as a goldsmith (金匠), took what had already been discovered, and created a small invention that changed history. He created a machine that allowed him to move small blocks of letters in such a way that written material could be printed and mass-produced. Few people could read before Guttenberg made the invention, but once books became less expensive, more Europeans could read and write.
Block printing existed long before Gutenberg. The Chinese had been using wood blocks to print books as early as 868, but a new set of woodcuts (木刻印版) had to be made for each book. Producing one book was not easy; producing all kinds of books was more difficult.
Writing ink dates from about 2500 BC in Egypt and China. Gutenberg used an oil-based printing ink that would last longer than other inks used in his time. We don’t know much about Gutenberg because he was not famous during his lifetime. He was born in Germany about 1400. In 1448, Gutenberg developed signatures for each number, letter, and punctuation mark (标点符号). He then built the molds (模型) to hold the signatures in place. Gutenberg published the first mass-produced book: a 1,282 page Bible. To this day, more copies of the Bible have been printed than any other book.
Copies of Gutenberg’s invention spread throughout Europe, but the German goldsmith did not get rich from his invention. Some officials denounced the invention of printing because they feared that it would spread bad ideas. By 1500 there were 1,700 printing presses in Europe. The presses had already produced about 20 million volumes (册) of 40,000 different books.What happened after Johann Gutenberg’s invention?
| A．People could afford to read books. |
| B．People became interested in inventing. |
| C．It was still difficult to print all kinds of books. |
| D．Punctuation mark began to be used in printing. |
Compared with block printing in China, Johann Gutenberg’s method _____.
| A．was difficult to run |
| B．needed harder paper |
| C．used a new kind of ink |
| D．was put into use earlier |
The underlined word “denounced” in the last paragraph means _____.
| A．fought against | B．accepted |
| C．laughed at | D．supported |
What is the best title for the text?
| A．A famous 1,282 page Bible |
| B．The life of a famous inventor |
| C．An invention that changed history |
| D．The development of printing |
We do not know when man first began to use salt, but we do know that it has been used in many different ways throughout history. Historical evidence shows, for example, that people who lived over 3,000 years ago ate salted fish. Thousands of years ago in Egypt, salt was used to preserve (保存) the dead.
Stealing salt was considered a major crime (罪行) during some periods of history. In the eighteenth century, for example, if a person was caught stealing salt, he could be put in prison and his ears could be cut off.
In the Roman Empire, one of the most important roads was the one that carried salt from the salt mines to Rome. Guards were stationed along the route to protect against salt thieves, and they received their pay in salt, thus bringing the English word, salary. Any guard who fell asleep while on duty was thought to be “not worth his salt”, and as a result he would get a little less salt on his next payday. The expression, “not worth his salt”, is still used today in English.
In the modern world salt has many uses beyond the dining table. It is used in making glass and airplane parts, in the growing of crops, and in the killing of weeds (杂草). It is also used to make water soft, to melt (融化) ice on roads and highways, to make soap, and to fix colors in cloth.
Salt can be got in various ways besides being taken from mines underground. Salt water from the ocean, salt water lakes or small seas can be used to make salt. Yet, no matter where it comes from, salt will continue to play an important role in the lives of people everywhere.According to the text, salt can be used in the following EXCEPT _____.
| A．keeping dead bodies |
| B．punishing thieves |
| C．protecting crops |
| D．making industrial products |
In the Roman Empire many people were employed as guards to _____.
| A．protect the city of Rome |
| B．watch people carrying salt |
| C．prevent thieves from stealing salt |
| D．carry salt from the mines to Rome |
The expression “not worth his salt” used today refers to the one who _____.
| A．fails to do his work well |
| B．should not be paid in salt |
| C．doesn’t want to work at all |
| D．should use less salt |
The main purpose of the text is to tell readers _____.
| A．how salt was found and got |
| B．salt is important in people’s life |
| C．salt was difficult to get in the past |
| D．what salt brings to the English language |