Grasshoppers are having to change their song — one of the iconic sounds of summer — to make themselves heard above the noise of road traffic, ecologists have discovered. The study, published in the British Ecological Society's journal Functional Ecology, is the first to show that human-made noise affects natural insect populations. Animals use sound to communicate for many reasons, including marking out territory, warning of predators and finding mates, and although previous research shows birds, whales and even frogs change their calls in noisy environments, the impact of human-made noise on insects has been neglected until now. Ulrike Lampe and colleagues from the University of Bielefeld in Germany caught 188 male bow-winged grasshoppers, half from quiet locations and half from beside busy roads. The grasshoppers use their song to attract mates.
The team then studied the differences in the two groups' songs in the laboratory. To encourage them to sing they exposed the males to a female grasshopper, and then recorded their courtship songs. Analysis of almost 1,000 recordings revealed grasshoppers living beside noisy roads produced different songs to those living in quieter locations.
According to Lampe: "Bow-winged grasshoppers produce songs that include low and high frequency components. We found that grasshoppers from noisy habitats increase the volume of the lower-frequency part of their song, which makes sense since road noise can mask signals in this part of the frequency spectrum(频谱)."
The team's findings are important because traffic noise could be upsetting the grasshopper's mating system(交配系统). "Increased noise levels could affect grasshopper courtship in several ways. It could prevent females from hearing male courtship songs properly, prevent females from recognizing males of their own species, or impair females' ability to estimate how attractive a male is from his song," Lampe explains.
Having discovered that human-made noise affects insect communication, the researchers now want to learn more about how the mechanism works, and whether the grasshoppers adapt to noise during their development as larvae（幼虫）, or whether males from noisy habitats produce different songs due to genetic differences.
The bow-winged grasshopper is a common species in Central Europe. Adults occur mainly between July and September, preferring dry grasslands. Around 1.5 cm long, they vary in colour from green and browns to red and purple. The male's song consists of 2 second-long phrases that increase in amplitude (振幅) towards the end. The beginning of a phrase is characterized by slower ticking sounds that increase in speed and amplitude, leading to a buzzing sound towards the end of the phrase. A courtship song usually includes 2 phrases.The author wrote the article to _________________.
| A．introduce how grasshoppers make noises to attract mates. |
| B．raise the awareness of protecting bow-winged grasshoppers. |
| C．inform us of a recent discovery of ecological research. |
| D．warn us that human-made noise has changed ecological system. |
Which of the following could be the main idea of the passage?
| A．Bow-winged grasshoppers use their songs to communicate. |
| B．Grasshoppers change their songs to adapt to the noisy environment. |
| C．Grasshoppers’ songs include both low and high frequency components. |
| D．Bow-winged grasshoppers are a common species in Central Europe. |
What does the underlined word “impair” in the fourth paragraph mean?
| A．repair | B．develop |
| C．weaken | D．improve |
Which of the following statements is true according the passage?
| A．Road noise can cover the lower-frequency part of their song. |
| B．Animals make sounds only for the purpose of finding mates. |
| C．Grasshopper larvae learn to adapt to human-made noise. |
| D．Bow-winged grasshoppers grow up into adults in spring. |
Most people know the feeling when you walk into a lift(电梯) with other people. A study has found that where people stand is based on their social position on entering the lift.
Rebekah Rousi, a Ph.D. student, did a study of lift behavior in two of the tallest office buildings in Adelaide, Australia. As part of her research, she took a total of 30 lift rides in the two buildings, and discovered there was a fixed order about where people chose to stand.
In her research paper, she wrote that more senior men seemed to walk straight towards the back of the lift. She said , “in front of them were younger men, and in front of them were women of all ages.” She also noticed there was a difference in the direction where people look during the ride. “Men watched the monitors, looked in the side mirrors (in one building) to see themselves, and in the door mirrors (in the other building) to watch others. Women would watch the monitors and avoid looking into others’ eyes (unless in conversations) and the mirrors.”
Rebekah Rousi concluded that shyer people stand toward the front, where they can’t see other passengers, while fearless people stand in the back, where they have a good view of everyone else.According to the study, where people stand in a lift is decided by __________.
| A．their social position |
| B．the monitors |
| C．other passengers |
| D．others’ position |
Who are most likely to go to the back of the lift?
| A．Shyer people. | B．Senior men. |
| C．Younger men. | D．Women. |
Which is true according to the passage?
| A．The order in which people stand in a lift is fixed. |
| B．Few people feel embarrassed with strangers in a lift. |
| C．Women like watching themselves in the side mirrors. |
| D．Fearless people stand in the back to avoid seeing others. |
The passage is probably taken from __________.
| A．a lift instruction | B．a story book |
| C．a travel guide | D．a newspaper |
Most people know that Marie Curie was the first woman to win the Nobel Prize, and the first person to win it twice. However, few people know that she was also the mother of a Nobel Prize winner.
Born in September, 1897, Irene Curie was the first of the Curies’ two daughters. She studied in her mother’s school, and finished her high school education at the College of Sevigne in Paris.
Irene entered the University of Paris in 1914 to prepare for a degree in mathematics and physics. When World War I began, Irene developed X-ray equipment in military(军事) hospitals in France and Belgium to help save the lives of wounded soldiers. Her services were recognized in the form of a Military Medal by the French government.
In 1918, Irene became her mother’s assistant at the Curie Institute. In December 1924, Frederic Joliot joined the Institute, and Irene taught him the techniques required for his work. They soon fell in love and got married in 1926. Their daughter Helene was born in 1927 and their son Pierre five years later.
Like her mother, Irene combined family and work. Like her mother, Irene was awarded a Nobel Prize, along with her husband, in 1935. Unfortunately, also like her mother, she developed leukemia because of her work with radioactivity（辐射能）. Irene Joliot-Curie died from leukemia on March 17, 1956.Irene Curie was awarded a Military Medal because she _____________.
| A．won the Nobel Prize with Frederic |
| B．received a degree in mathematics |
| C．contributed to saving the wounded |
| D．worked as a helper to her mother |
Where did Irene Curie meet her husband Frederic Joliot?
| A．At the College of Sevigne. |
| B．At the Curie Institute. |
| C．At the University of Paris. |
| D．At a military hospital. |
The underlined word “leukemia” probably refers to a __________.
| A．habit | B．research |
| C．machine | D．disease |
Would you like to be a king or queen? To have people waiting on you hand and foot? Many Americans experience this royal treatment every day. How? By being customers. The American idea of customer service is to make each customer the center of attention. Need proof? Just listen to the commercials. Most of them sound like the McDonald’s ad: “We do it all for you.” Actually, not all stores in America roll out the red carpet for their customers. But wherever you go, good customer service means making customers feel special.
People going shopping in America can expect to be treated with respect from the very beginning. Most places don’t have a “furniture street” or a “computer road” which allow you to compare prices easily. Instead, people often “let their fingers do the walking” through the store hot lines. From the first “hello”, customers receive a satisfying response to their questions. This initial contact can help them decide where to shop.
When customers get to the store, they are treated as honored guests. Customers don’t usually find store clerks sitting around watching TV or playing cards. Instead, the clerks greet them warmly and offer to help them find what they want. In most stores, the clear signs that label each department make shopping a breeze. Customers usually don’t have to ask how much items cost, since prices are clearly marked. And unless they’re at a flea market or a yard sale, they don’t bother trying to bargain.
When customers are ready to check out, they find the nearest and shortest checkout lane. But as Murphy’s Law would have it, whichever lane they get in, all the other lanes will move faster. Good stores open new checkout lanes when the lanes get too long. Some even offer express lanes for customers with 10 items or less. After they pay for their purchases, customers receive a smile and a warm “thank you” from the clerk. Many stores even allow customers to take their shopping carts out to the parking lot. That way, they don’t have to carry heavy bags out to the car.By quoting (引用) the McDonald’s ad: “We do it all for you”, the author intends to_______.
| A．suggest that customers believe what mercials say deeply |
| B．show readers the American idea on good customer service |
| C．express all the stores pay much attention to the customers |
| D．persuade readers to choose the stores with ads correctly |
In the USA, what may you do at first if you want to do some shopping?
| A．To visit a professional street with lots of similar stores. |
| B．To pare prices in many shops in the same street. |
| C．To make phone calls and get better shopping choices. |
| D．To receive other customers’ answers to the questions. |
Which of the followings shows American stores offer convenience to customers in this passage?
| A．The store clerks don’t usually sit around watching TV or playing cards. |
| B．Some stores offer price bargain to the customers like a yard sale. |
| C．The clerks give customers a smile and a warm “thank you” after paying. |
| D．Some stores open new checkout lanes when the lanes are crowded. |
Which of the following can be the best title of this passage?
| A．Customer Service in America |
| B．Excellent Stores in America |
| C．Shopping Rules in America |
| D．Being King or Queen in America |
Henry was a pen name used by an American writer of short stories. His real name was William Sydney Porter. He was born in North Carolina in 1862. As a young boy he lived an exciting life. He did not go to school for very long, but he managed to teach himself everything he needed to know. When he was about 20 years old, O. Henry went to Texas, where he tried different jobs. He first worked on a newspaper, and then had a job in a bank, when some money went missing from the bank O. Henry was believed to have stolen it. Because of that, he was sent to prison. During the three years in prison, he learned to write short stories. After he got out of prison, he went to New York and continued writing. He wrote mostly about New York and the life of the poor there. People liked his stories, because simple as the tales were, they would finish with a sudden change at the end, to the reader’s surprise.In which order did O. Henry do the following things?
a. Lived in New York.b. Worked in a bank.
c. Travelled to Texas. d. Was put in prison.
e. Had a newspaper job. f. Learned to write stories.
| A．e. c. f. b. d. a | B．c. e. b. d. f. A |
| C．e. b. d. c. a. f. | D．c. b. e. d. a f. |
O. Henry went to prison because.
| A．people thought he had stolen money from the newspaper |
| B．he broke the law by not using his own name |
| C．he wanted to write stories about prisoners |
| D．people thought he had taken money that was not his |
What do we know about O. Henry before he began writing?
| A．He was well-educated. |
| B．He was not serious about his work. |
| C．He was devoted to the poor. |
| D．He was very good at learning. |
Where did O. Henry get most material for his short stories?
| A．His life inside the prison. |
| B．The newspaper articles he wrote. |
| C．The city and people of New York. |
| D．His exciting early life as a boy. |
It was a winter morning, just a couple of weeks before Christmas 2005. While most people were warming up their cars, Trevor, my husband, had to get up early to ride his bike four kilometers away from home to work. On arrival, he parked his bike outside the back door as he usually does. After putting in 10 hours of labor, he returned to find his bike gone.
The bike, a black Kona 18 speed, was our only transport. Trevor used it to get to work, putting in 60-hour weeks to support his young family. And the bike was also used to get groceries（食品杂货），saving us from having to walk long distances from where we live.
I was so sad that someone would steal our bike that I wrote to the newspaper and told them our story. Shortly after that, several people in our area offered to help. One wonderful stranger even bought a bike, then called my husband to pick it up. Once again my husband had a way to get to and from his job. It really is an honor that a plete stranger would go out of their way for someone they have never met before.
People say that a smile can be passed from one person to another, but acts of kindness from strangers are even more so. This experience has had a spreading effect in our lives because it strengthened our faith in humanity（人性）as a whole. And it has influenced us to be more mindful of ways we, too, can share with others. No matter how big or how small, an act of kindness shows that someone cares. And the results can be everlasting.Why was the bike so important to the couple?
| A．The man’s job was bike racing. |
| B．It was their only possession. |
| C．It was a nice Kona 18 speed. |
| D．They used it for work and daily life. |
We can infer from the text that ____________.
| A．the couple worked 60 hours a week. |
| B．people were busy before Christmas |
| C．the stranger brought over the bike |
| D．life was hard for the young family. |
How did people get to know the couple’s problem?
| A．From radio broadcasts. |
| B．From a newspaper. |
| C．From TV news. |
| D．From a stranger. |
What do the couple learn from their experience?
| A．Strangers are usually of little help. |
| B．One should take care of their bike. |
| C．News reports make people famous. |
| D．An act of kindness can mean a lot. |