Mars( 火星) appears to be flowing with small streams of salty water, at least in the summer, scientists reported Monday. "It suggests that. it would be possible for there to be life today on Mars," NASA's science mission chief, John Grunsfeld, said at a news conference on September 28, 2015.
The streams are about 12 to 15 feet wide and 300 feet or more long, scientists said. "What we're dealing with is wet soil. thin layers of wet soil, not standing water," said Aifred McEwen of the University of Arizona at Tueson ! the principal scientist for the Mars Reconnaissance Orbiter's high-resolution imaging experiment.
Because liquid water is essential to life, the findings could have major implications for the possibility of Martian life. The researchers said further exploration is needed to determine whether microscopic life exists on the planet.
The presence of liquid water could also make life easier for astronauts visiting or living on Mars. Water could be used for drinking and for creating oxygen and rocket fuel. NASA's goal is to send humans there in the 2030s.
The evidence of flowing water consists largely of dark, narrow streaks(条痕) on the surface that tend to appear and grow during the warmest Martian months and fade the rest of the year.
Mars is extremely cold even in summer, and the streaks are in places where the temperature is as low as minus 10 degrees Fahrenheit. But salt can lower the freezing point of water and melt ice.
The source(源头) of the water is a mystery. Scientists noted it could be melting ice. It could be an underground aquifer, which is rock or sand that can hold water. It is possibly water vapor from the thin Martian atmosphere, Or it may be a combination.
Michael Meyer, lead scientist for NASA's Mars exploration program, said the only definitive way for now to determine whether there's life on Mars is to collect rocks and soil for analysis on Earth - something a U. S. lander set for lift-off in 2020 will do.
What would be the best title for the text?
A Streams of Water Spotted on Mars
B. Astronauts will Land on Mars
C. NASA's Mars Exploration Program
D. A Breakthrough in the Exploration of Mars
According to John Grunsfeld, there seems to be on Mars.
| A．salty water |
| B．standing water |
| C．rocket fuel |
| D．human beings |
Scientists are uncertain about the of the water on Mars.
| A．state |
| B．source |
| C．temperature |
| D．taste |
What matters to the existence of liquid water on Mars?
| A．The distance from the sun. |
| B．The favorable climate. |
| C．The gravity of the earth |
| D．The salt in it． |
In the summer of 1978 an English farmer was driving his tractor through a field of wheat when he discovered that some of his wheat was lying flat on the ground. The flattened wheat formed a circle about six meters across. Around this circle were four smaller circles of flattened wheat. The five circles were in a formation（结构） like five dots. During the following years, farmers in England found the strange circles in their fields more and more often.
The circles are called “crop circles” because they appear in the fields of grain ― usually wheat or corn. The grain in the circles lies flat on the ground but is never broken; it continues to grow, and farmers can later harvest it. Farmers always discover the crop circles in the morning, so the circles probably form at night. They appear only in the months from May to September.
At first, people thought that the circles were a hoax. Probably young people were making them as a joke, or farmers were making them to attract tourists. To prove that the circles were a hoax, people tried to make circles exactly like the ones that farmers had found. They couldn’t do it. They couldn’t enter a field of grain without leaving tracks, and they couldn’t flatten the grain without breaking it.
Many people believe that beings from outer space are making the circles to communicate with us from far away and that the crop circles are messages from them.
Scientists who have studied the crop circles suggested several possibilities. Some scientists say that a downward rush of wind leads to the formation of the circles — the same downward lash of air that sometimes causes an airplane to crash. Other scientists say that forces within the earth cause the circles to appear. There is one problem with all these scientific explanations: crop circles often appear in formations, like the five-dot formation. It is hard to believe that any natural force could form those.In the summer of 1978, an English farmer discovered in his field that ______.
| A．some of his wheat had fallen onto the ground |
| B．some of his wheat had been damaged |
| C．his grain was growing up in circles |
| D．his grain was moved into several circles |
The underlined word "hoax" in Paragraph 3 is probably ______.
| A．a research on the force of winds |
| B．an attempt made to fool people |
| C．an experiment for the protection of crops |
| D．a special way to plant crops |
Which of the following may prove that the crop circles are not made by man?
| A．The farmers couldn’t step out of the field. |
| B．The farmers couldn’t leave without footprints. |
| C．The farmers couldn’t make the circles round. |
| D．The farmers couldn’t keep the wheat straight up. |
One explanation given by scientists for the crop circles is that they are made by _____.
| A．air movement | B．airplane crashes |
| C．unknown flying objects | D．new farming techniques |
In New York, Ma witnessed the Alibaba Group opening on the New York stock exchange with the largest initial public offering (IPO，新股发行) in American history. “Alibaba, the world’s largest Internet commerce（贸易） company makes China equal to the US in the rapidly increasing global competition for technological innovation (创新) and economic transformation ” commented（评论） the South China Morning Post.
It has also made Ma China’s richest man with a fortune of around $25 billion (153 billion yuan), reported Reuters.
It’s reported that Ma’s rags-to-riches journey is just as spectacular as his Internet empire. Ma failed the national college entrance exams twice before he was finally in Hangzhou Normal University on his third attempt and failed in finding a suitable job several times. Also, Mr. Ma is a big believer in perseverance, which was proved in his English study experience.
However, it was his vision and goals that launched his career.
During a short trip to the US as an interpreter in 1995, Ma first experienced the Internet. He believed in the Internet’s business potential when few other Chinese people did. He started Alibaba in his Hangzhou apartment, with 17 friends and $60,000 of funds. At the time, when e-commerce was unheard of in China, “I called myself a blind man riding on the back of blind tigers,” he once said, according to The Guardian. His unusual ideas earned him the nickname “Crazy Jack Ma”.
Indeed, Ma is different. Although he is very thin and about 160cm tall, “Ma is yet animated and forceful, said The Guardian. “He is funny, creative, and a compelling (引人注目的) speaker.
Ma told Time magazine that he was “old for the Internet”. He started to slow down and looked around. According to The Wall Street Journal, Ma “plans to open a tai chi club with the actor Jet Li, build an entrepreneur (企业家) university in Hangzhou and continue to work on several environmental projects.”What made him into e-commerce industry?
| A．His belief in perseverance. |
| B．His English learning experience. |
| C．His foresight and ambitions. |
| D．His 17 friends and $60,000 funds. |
What does the underlined sentence in Paragraph 5 mean?
| A．Ma knew little about e-commerce. |
| B．Ma had no confidence in his business future. |
| C．Ma is a blind man riding on a blind tiger. |
| D．Ma had not enough money at that time. |
What’s the personality of Ma Yun according to the passage?
| A．Funny and competitive. |
| B．Attractive and believable |
| C．Rich and different. |
| D．Determined and creative. |
What’s the best title of the passage?
| A．The Development of Alibaba Group |
| B．Ma Yun’s Crazy Success. |
| C．Ma Yun’s Personal Life |
| D．E-commerce in China |
(Reuters) --- A stampede（蜂拥） killed at least 36 people during New Year's Eve celebrations in Shanghai, authorities said, but the police denied reports that it was caused by people rushing to pick up fake money thrown from a building overlooking the city's famous waterfront.
It was the worst disaster in the modern city since 58 died in an apartment building fire in 2010.
The cause of the crush has still to be confirmed, though state media and some witnesses have said it was at least partly aroused when people rushed to pick up coupons that looked like bank notes.
A man named Wu said the fake money had been thrown down from a bar above the street as part of the celebrations.
"This incident happened after the stampede," police said in a brief statement, without saying what the real cause was.
Another witness said there had been a problem away from the area where the fake bills were thrown, with people trying to get on to a raised platform overlooking the river.
Xinhua news agency said that people had been trampled on after falling down on the steps up to the platform.
Authorities had shown some concern about crowd control in the days leading up to New Year's Eve. They recently canceled an annual 3D laser（激光器） show on the Bund, which last year attracted as many as 300,000 people.
On New Year's Eve, Beijing also canceled a countdown event in the central business district, Chinese media said, due to police fears about overcrowding.
The Shanghai government said on its official microblog that an inquiry had begun, and that all other New Year events had been canceled.
In 2004, 37 people died in a stampede in northern Beijing, on a bridge at a scenic spot, during the Lunar New Year holiday.According to the passage, why did people go to the Bund?
| A．To meet their old friends and relatives. |
| B．To watch an annual 3D laser show. |
| C．To celebrate the New Year’s Eve. |
| D．To pick up bank notes. |
What can be inferred according to the passage?
| A．People like 3D laser show better than any other events. |
| B．Some possible measures had been taken by authorities. |
| C．The local government had shown their worry about overcrowding. |
| D．The celebrations in Beijing were influenced by this stampede. |
What’s the passage about?
| A．A stampede on New Year’s Eve in Shanghai. |
| B．A laser show on the Bund. |
| C．An apartment fire in Shanghai. |
| D．A countdown event in Beijing. |
Why was Bastille important to the citizens of Paris? The building of the Bastille had been started in 1370 under Charles V. By the seventeenth century, it had stopped to be important for defense. Cardinal Richelieu turned it into a prison. It was not an ordinary prison to punish common crimes. Its huge doors closed only on enemies of the King. The Bastille's workings were secret. Prisoners were taken to it in closed vehicles. Soldiers on guard duty had to stand with their faces to the wall. No talking was allowed. Worst of all, a prisoner never knew if he would be there a day, a week, a year, or forever. Only the King's letter could set him free.
Over the years, the number of arrests by King's letter had become fewer. By the time of its fall, most of the prisoners were writers who had written against the corruptions(贪污腐败) of the government. Voltaire, the famous French writer, spent a year there in 1717-1718, and another 12 days in 1726.
For those who believed in free speech and free thinking, the Bastille stood for everything evil. The day it was captured, only seven prisoners were found inside. Still, the Bastille was hated by the people. It was a symbol of the King's complete power. The Bastille had been a prison ______.
| A．since the time of Charles V |
| B．since 1370 |
| C．since the time of Cardinal Richelieu |
| D．before the seventeenth century |
According to the passage, which of the following statements is FALSE?
| A．Voltaire was twice put in the Bastille. |
| B．The Bastille was only for those who were opposed to the King. |
| C．Things done in the Bastille were hardly known to people outside. |
| D．Anyone who did something wrong could find himself suddenly in the Bastille. |
At the time of its fall, the Bastille housed ______.
| A．only a few prisoners |
| B．a lot of writers who had been against the government |
| C．a large number of prisoners |
| D．some dozens of people who believed in free speech and free thinking |
Which of the following statements is TRUE according to the passage?
| A．All prisoners in the Bastille had to stay there for life. |
| B．Over the years the number of prisoners in the Bastille was getting more and more. |
| C．The King could put people in, or let them go out, as he wanted. |
| D．At the time it was captured, there were so few prisoners in it that it meant little to the people. |
For some minutes, all was quiet in the street. Then, from across the street, someone came walking at a slow pace.
It looked like a man of middle height, dressed in a big raincoat, a soft hat and rubber soled boots or shoes, and making little sound while walking: at most a soft, sliding sound. No one was in sight. It was a street with two rows of about fifty small houses, and there were three lamps on either side. The lamp nearest the child’s house could be seen clearly, but the others were almost hidden by the smoky air. A car passed the end of the street and its lights showed faintly, but clearly enough the wrinkled skin of a woman’s small face. The car disappeared as the woman, wrapped up in her coat, reached the doorway of the child’s house.
She put a key into the lock quickly, pushed the door open and stepped inside, then close the door without looking round. She began to breathe hard.
She leaned against the door for a moment, then straightened up as if with an effort, and walked towards the door of the front room, the passage leading to the kitchen, and the narrow staircase. She hesitated outside the door, and then went up the stairs, quickly but with hardly a sound. There was enough light from the narrow hall to show the four doors leading off a small landing. She pushed each door open in turn and shone a torch inside, and the light fell upon beds, walls, furniture, a bathroom band basin, a mirror which flashed brightness back; but this was not what the woman was looking for. She turned away and went downstairs and hesitated again at the foot of the stairs, then turned towards the kitchen. Clearly there was nothing there, or in the small wash-room, that she wanted. Two rooms remained; the front room and a smaller one next to it. She opened the front room door. After a moment, she saw the child’s bed and the child.The lights of the car passing the end of the street showed that _______.
| A．a woman was walking by herself up the street |
| B．a man was walking up the street |
| C．a man was driving by himself up the street |
| D．a woman was driving the car |
When she got into the house, the woman ______.
| A．went upstairs at once | B．seemed tired |
| C．started breathing again | D．felt excited |
What the woman was looking for was _______.
| A．furniture | B．a bathroom-basin |
| C．a room | D．a child |
From the description above we can see that the woman was _______.
| A．old and earnest | B． energetic and cold |
| C．young and powerful | D． weak and hopeless |