The findings of a new survey have American professors talking about the good old days—when A's were a lot tougher to earn．
Sites like Rate My Professors．com make it easy for students to find a class taught by a professor who is known as an "easy grader"．A recent survey by Kaplan Test Prep found that 46 percent of the more than 1,200 students polled admitted to using the site for just such a purpose．
"Our research shows that many of today's college students are looking at multiple factors when picking out courses: overall teacher quality that will result in a good learning experience, but also instructors who don't like to award a lot of C's and D's," said Jeff Olson, vice president of research at Kaplan Test Prep．
"While it makes sense that students would choose kinder graders, it also helps explain the recent popularity of grade inflation（膨胀）．"
Grade inflation is seen by many professors as poisoning the learning environment．Some, like former Duke University professor Stuart Rojstaczer, are righting it head-on．
On his website, Gradelnflation．com, he releases an annual list of schools where grade inflation is the worst．
This year, he decided to name the schools where grades were inflated the least．He praised, for example, Princeton University, as well as Purdue University, where the average GPA has remained around 2．8 for over 30 years．
"Purdue doesn't even seem to know that grade inflation exists in the US," Rojstaczer says．"Ignorance is bliss（极大的幸福）．"Grade inflation is spreading because _____．
| A．it's poisoning the learning environment |
| B．instructors intend to improve their overall teaching quality |
| C．many instructors adapt to the students' expectations |
| D．students get easy access to sites like RateMyProfessors．com |
The passage suggests that _____．
| A．universities will employ hard graders |
| B．if we want to be happy, we should be ignorant |
| C．A's are becoming easy to earn at most US universities |
| D．professors and instructors should give students higher grades |
The writer tends to _____．
| A．favor easy graders | B．see grade inflation as unavoidable |
| C．oppose Kaplan Test Prep | D．miss the days when A's were hard to earn |
Daniel Olin was 11 years old when his parents moved to Canada. He liked his new school and made friends there, but then things at home started to change. His mum and dad began to argue and the arguments got worse and worse until one day, Daniel's mum left. With his father working long hours, Daniel felt very lonely and very unhappy. He wanted to escape, to run away. And that’s what he did.
Very early one terribly cold morning when the snow was deep on the ground, he packed a bag with some clothes, some chocolate and a map of Canada and set off to a forest. He ran and ran until he could hardly breathe.
His feet were heavy with the snow but he still walked on through deep snow, not even watching where he was going.
Then, disaster struck. A rock hidden by the deep snow caught his feet and Daniel fell to the ground. He had broken the bone. He was very cold and was starting to feel tired, but he knew that if he fell asleep in the snow, he would certainly die from the cold.
A tree shook ahead. From within the branches(树枝), a pair of yellow eyes watched Daniel. The puma (美洲狮) had been following him. A puma is a large wild cat with claws that could tear Daniel into pieces. But instead of moving in for the kill, the puma walked up to Daniel and lay across his chest, arms and legs. Daniel was too frightened to move, but soon the warmth of the animal reached Daniel and he began to feel better. From time to time, the puma pressed his muzzle (鼻) against Daniel and rocked his head gently. Clearly, the puma knew that Daniel must not fall asleep. This animal should have been a real danger to Daniel and yet the boy began to feel safe. They remained like that for several hours until Daniel and the puma heard voices.
Daniel ran away from home because ______.
| A．he had a big argument with his father |
| B．he wanted to learn to be independent |
| C．he didn’t get enough care from his parents |
| D．his parents were always arguing at home |
Why didn’t Daniel notice the rock that caused him to fall?
| A．Because it was getting dark. |
| B．Because the rock was hidden by snow. |
| C．Because he was frightened by a puma. |
| D．Because he was too sad to notice it. |
Why did the puma press its muzzle against Dan and rock his head gently from time to time?
| A．To keep Daniel warm. | B．To play with Daniel. |
| C．To kill Daniel. | D．To keep Daniel awake. |
What is the best title for the story?
| A．Puma in Danger | B．A Caring Puma |
| C．A Boy in Need | D．A Homeless Boy |
“You have cancer” are the three words you never want to hear. Unfortunately, over 5, 000 people in North America do hear those words--every single day. Even worse, cancer has become the second leading cause of death for Americans. America’s health practitioner (从业人员), David Brownstein, M. D., has spent much of his medical career studying cancer, and learning the best ways to avoid becoming its victim.
And Dr. Brownstein does not shy away from (回避) the hard truth. Statistics demonstrate we are not winning the war on cancer. Far from it. In fact, cancer death rates have remained nearly unchanged over the last 80 years. Plus, traditional cancer treatments have been a terrible failure. Because the only big winner in the cancer treatment story to date has been the cancer industry’s multibillion-dollar profits, Dr. Brownstein has just released a free video documentary revealing some of his startling (令人吃惊的) findings.
In this video, you’ll discover five specific signs that you will be diagnosed (诊断) with cancer during your lifetime. Even more important, you’ll see:
*Seven simple but smart steps to prevent cancer from taking over your body.
*How to help your body naturally kill cancer cells.
*Easiest ways to avoid known cancer-causing factors.
*The little-known relationship between iodine (碘) and cancer.
*And much, much more…
According to Dr. Brownstein, nearly all of us have cancer cells in our bodies at various times during our lives. The trick is to avoid letting those cells increase and defeat the body’s natural defenses.
The good news is that you and your loved ones do not need to become cancer victims. With the simple methods revealed in Dr. Brownstein’s eye-opening video, you can take steps to prevent this deadly disease.
Newsman Health managed to bring it directly to you free of charge. Click here to start watching this powerful video about preventing cancer immediately. With so many people dying needlessly, there’s no time to waste.We can learn from Paragraph 1 that ________.
| A．David Brownstein makes no progress in preventing cancer |
| B．cancer is the leading cause of death for Americans |
| C．David Brownstein himself is suffering from cancer |
| D．cancer victims are increasing in North America |
What do we know about cancer in America?
| A．Cancer death rates are dropping. |
| B．Cancer industry is very profitable. |
| C．Traditional cancer treatments are effective. |
| D．Cancer medicine was invented 80 years ago. |
What does the underlined part “the hard truth” refer to in Paragraph 2?
| A．David Brownstein’s video is unpopular. |
| B．It needs another 80 years to cure cancer. |
| C．People don’t know cancer death rates. |
| D．People’s inability to defeat cancer. |
What’s the purpose of the passage?
| A．To recommend a video. |
| B．To introduce some doctors. |
| C．To teach us how to make a video. |
| D．To give us some tips on dealing with cancer. |
Mosquitoes(蚊子) ruin countless American picnics every year, but around the world, this bloodsucking beast isn’t just annoying--it causes a health problem. More than a million people die from the spread of mosquito-borne diseases like malaria and yellow fever each year. Attempts to control populations via insecticides like DDT have had ruinous side effects for nature and human health. Neurobiologist Leslie B. Vosshall has a different solution for stopping the insects and the spread of disease. “I believe the key to controlling mosquito behavior is to understand better how they sense us,” she says.
At their Rockefeller University lab, Vosshall and her colleagues are studying the chemical sensory processes by which mosquitoes choose hosts. How do they sense heat, humidity, carbon dioxide, and body odor(气味)? What makes some people more attractive to a mosquito than others? It takes blood and sweat to find out. To study how mosquitoes assess body odor, Vosshall and her teammates might wear stockings on their arms and keep from showering for 24 hours to create sample smells, Then comes the hard part. They insert their arms into the insects’ hidden home to study how mosquitoes land, bite, and feed and then they document how this changes. This can mean getting anywhere from one bite to 400, depending on the experiment. Studying male mosquitoes is more pleasant. Since they don’t feed on blood, the lab tests their sense of smell using honey.
Vosshall and her team have also begun to study how genetics contribute to mosquitoes’ choice of a host. She’s even created a breed that is unable to sense carbon dioxide, an important trigger for the insects. “By using genetics to make mutant(变异的) mosquitoes, we can document exactly how and why mosquitoes hunt humans,” Vosshall says.
Once Vosshall figures out what makes mosquitoes flock to us, she can get to work on making them leave us alone. Many of her lab’s proposed solutions sound simple enough, including bracelets(手镯) that carry long-lasting repellants(驱虫剂) or traps that can reduce populations, but the breakthroughs, when they come, may save millions of lives in the developing world—and a lot of itching everywhere else.Vosshall and her colleagues are mainly studying mosquitoes’ ______.
| A．appearance | B．size |
| C．behavior | D．change |
By saying the underlined part “Then comes the hard part”, the author probably means that______.
| A．the insects smell terrible |
| B．the experiment will last long |
| C．The researchers will probably suffer |
| D．the researchers have to study lots of documents. |
Why is it less challenging to study male mosquitoes?
| A．They are not bloodsuckers. |
| B．They are afraid of stockings. |
| C．They have a poor sense of smell. |
| D．They are protective of their hosts. |
It can be inferred from the last paragraph that Vosshall’s research______.
| A．looks very promising |
| B．has saved millions of lives |
| C．is facing great difficulties |
| D．is quite simple to carry out. |
With its 775 rooms, Buckingham Palace makes regular houses look tiny. Now home to Queen Elizabeth II, it’s been the British Monarchy’s official London digs since 1837. National Geographic Kids slipped behind the guarded gates to find the palace’s coolest features.
1. FANCY FEAST
For special dinners, a team of 21 chefs whips up dishes that are served on solid gold plates. Even Her Majesty’s pet dogs receive meals of lamb and cabbage in silver bowls. Good thing the kitchen is well stocked--- the Queen welcomes about 50,000 dining guests every year.
2. CLASSY COACH
The Queen’s most attractive ride may be the Gold State Coach, parked in the palace’s Royal Mews building and used in the crowning of a king or queen, since 1821. Covered with heavy gold, it’s pulled by eight horses.
3. MOVIE NIGHT
The royal family hosts private screenings of movie in their very own cinema, sometimes seeing new films before they hit theaters.
4. WHAT’S UP, DOC?
Forget a medicine cabinet (药品柜). Buckingham Palace houses a doctor’s office run by the Queen’s physician. And surgeons have performed operations in other parts of the palace. In 1902, for instance, doctors operated on King Edward VII in a room facing the garden.
5. BEDROOMS
The palace has 52 bedrooms. Rooms such as those inside the Belgian Suite contain chandeliers(枝行吊灯), gold-gilded mirrors, fireplaces, canopy beds, and more.
6. TOP- SECRET TUNNELS
Rumor has it that secret underground tunnels connect the royal residence to other buildings in London. The paths were reportedly built during World War II when enemy bombs regularly pounded the city. Weaving deep under London’s busy streets, the tunnels would have provided the royals safe passage during an attack. But even now officials won’t reveal much about these under- the- radar routes.The underlined part “whips up” probably means_______.
| A．enjoys | B．selects | C．cleans | D．cooks |
According to the text, in Buckingham Palace________.
| A．there are eight horses altogether |
| B．stocks of food in the kitchen hardly run low |
| C．the Queen’s pet dogs are fed with simple meals |
| D．there’s no suitable place to perform operations |
What do we know about the tunnels in Buckingham Palace?
| A．They are not well- protected. |
| B．They were heavily bombed. |
| C．They are not open to the public. |
| D．They are linked with other cities in Britain. |
Have you ever dreamed of visiting a planet in the Milky Way (银河系)? While the trip sounds exciting, it would take years and years to reach your destination. So in the future, bedtime for astronauts may be more than a few hours of regular shut eyes. They would have to sleep for years.
European researchers are now conducting hibernation experiments. The study may help them understand whether humans could ever sleep through the years it would take for a spaceflight to distant planets. "If there was an effective technology, it could make deepspace travel a reality," said Mark Ayre of the European Space Agency last month.
What seems like a science fiction is not completely unlikely. Researchers have been able to use chemicals to put living cells into a sleeplike state where they don’t age. They have now moved on to the small, nonhibernating mammals like rats.
A major challenge is the fact that cells can be very simple systems, whereas body organs are far more complex. "It’s like moving from a simple Apple computer to a supercomputer," said Marco Biggiogera, a hibernation researcher at Italy’s University of Pavia. Just like bears and frogs, the hibernation of human beings would cause a person’s metabolism (新陈代谢) to lower so they would need less energy.
Medical research, however, is just half of a spaceflight hibernation system. There is a challenge of designing a suitable protective shelter. Such a shelter would provide the proper environment for hibernation, such as the proper temperature. It would also have to monitor life functions and serve the physiological needs of the hibernator.
According to Ayre, the sixperson Human Outer Planets Exploration Mission (使命) to Jupiter’s moon (木星的卫星) Callisto, could be an opportunity to use human hibernation. The mission aims to send six persons on a fiveyear flight to Callisto, where they will spend 30 days, in 2045.According to the article, the hibernation research _______.
| A．is just an idea |
| B．is always a science fiction |
| C．has already finished successfully |
| D．has made some progress |
In a hibernating state, a person needs ________.
| A．less sleep | B．more food |
| C．less energy | D．more movement |
The first try of the hibernation technology the sixperson Human Outer Planets Exploration Mission to Jupiter’s moon Callisto.
| A．will be | B．has been planned for |
| C．is certain to be | D．may be |
What is the best title of the article?
| A．Hibernation study for space travel |
| B．Welcome to our space travel |
| C．To hibernate, to live longer |
| D．Welcome to the Milky Way |
粤公网安备 44130202000953号