Why do human beings still risk their lives under ground and doing one of the dirtiest and most dangerous jobs in the world？A small group of engineers and robotics experts envision(展望) a day in the not-too-distant future when robots and other technology do most of the dangerous mining work.
One of the first mining robots was developed five years ago at Carnegie Mellon University's Robotics Institute. It was called Groundhog and it looked like a golf cart. It used lasers(激光) to “see” in dark tunnels and map abandoned mines－some of the most dangerous work in the business.
The latest prototype is called Cave Crawler. It's a bit smaller than Groundhog，and even more advanced. It can take photos and videos and has sensors that can detect the presence of dangerous gases. Incredibly，the robot has a real sense of logic. If it comes across an obstacle it gets momentarily confused. It has to think about what to do and where to go next. Sometimes it throws_a_fit just like a real person.
Myles and his colleagues hope that robots like Cave Crawler will one day be used in rescue operations. “A robot could speed up the rescue process by doing reconnaissance(侦察)，” says Chuck Whittaker，a robotics engineer at Carnegie Mellon. “The robot can go ahead and，with its sensors，report what it has found and whether it is safe for humans to proceed.”
Using robots in rescue operations，though，is problematic. The lasers that guide the robots don't work in smoky environments so the engineers at Carnegie Mellon have experimented with sonar(声呐)and radar guidance systems，and with some success.
Some experts predict that robots in mines will serve much of the same function that they do in the automotive industry. The robots do the most repetitive and dangerous jobs，but won't get rid of the need for human workers.The underlined phrase “throws a fit” in Paragraph 3 probably means ______.
| A．gets angry |
| B．gets shocked |
| C．becomes confused |
| D．becomes cheerful |
The latest robot is more advanced than Groundhog mainly because ________.
| A．it can map abandoned mines |
| B．it can see in the dark tunnels |
| C．it's smaller than Groundhog |
| D．it has a real sense of logic |
We can infer from the last paragraph that ________.
| A．the mining robots will have a very bright future |
| B．robots in the automotive industry must be improved |
| C．there will be no need for human workers in mines |
| D．robots in mines will cost a lot |
What can guide the robots in smoky environments?
| A．The lasers. |
| B．Sonar and radar guidance systems. |
| C．Command guidance systems. |
| D．Image matching guidance systems. |
Humans aren’t the only ones getting a buzz from coffee．Caffeine can improve memory among honeybees and lead to better pollination(授粉)．According to a recent study published in the journal Science．
The study was conducted by a team of researchers at Newcastle University in the United Kingdom．They found that the nectar(花蜜)of some flowers，such as those from grapefruit and lemon plants，as well as certain coffee flowers，contains low doses of caffeine．To get bees to feed on these flowers，the team trained the insects to associate food with the smell of the flowers．They also trained another group of bees to feed on nectar from flowers that were sweetened with a sugar, but did not contain caffeine．After 24 hours，the bees trained on caffeinated flowers returned to these plants three times as often as those trained on the sweetened flowers returned to the uncaffeinated plants．
Professor Geraldine Wright led the researchers．“Remembering floral traits(花部特征)is difficult for bees to perform at a fast pace as they fly from flower to flower and we found that caffeine helps the bee remember where the flowers are，”Wright said in a statement．
Improved memory led to the better pollination．That’s because once bees sip the caffeine nectar, they continue to look for more coffee plants to pollinate．This also suggests that caffeine plays a role in improving the bees’ability to search for food．
Researchers found that caffeine’s effect on the bee brain is similar to its effect on mammals．“The change is similar to that produced by caffeine in neurons(神经元)associated with learning and memory in the rat brain，”Wright said．
Bee populations have declining since 2007．The dramatic drop in the insects’numbers has serious effects for ecosystems and the farming industry．Bees are needed in the reproduction of crops and spreading wild flower species．Understanding what keeps bees buzzing could help to make sure that the insects are able to remember and pollinate their favorite flowers．Which of the following is mentioned in the passage?
| A．Caffeine has no effect on the rat brain． |
| B． Bee population has been increasing． |
| C．The nectar of lemon plants contains caffeine． |
| D．Bees dislike nectar from sweetened flowers． |
After reading the passage，John，who works in the farming industry, will probably feel ____________.
| A．annoyed | B．angry | C．nervous | D．excited |
Which of the following relationship is correct according to the passage?
| A．improved memory—caffeine nectar—better pollination |
| B．caffeine nectar—improved memory—better pollination |
| C．improved memory—better pollination—caffeine nectar |
| D．caffeine nectar—better pollination—improved memory |
What section of a newspaper may this passage be taken from?
| A．Science | B．Education |
| C．Culture | D．Sports |
In the Caucasus (高加索) region of Russia, nearly 50 out of every 100,000 people live to celebrate their 100th birthday, and many don’t stop at 100! By comparison, in America only 3 people in 100,000 reach 100. But these Russian old people aren’t alone. The Pakistanis, who live high in the Himalaya Mountains, and the Ecuadorans (厄瓜多尔人) of the Andes Mountains seem to share the secret of long life, too.
These people remain healthy in body and spirit despite the passage of time. While many older persons in industrial societies become weak and ill in their 60s and 70s, some Caucasians aged 100 to 140, work in the fields beside their great-great-grandchildren. Even the idea of aging is foreign to them. When asked “at what age does youth end?” most of these old people had no answer. Several replied, “Well, perhaps at age 80.”
What accounts for (解释) this ability to survive to such old age, and to survive so well? First of all, hard physical work is a way of life for all of these long-living people. They begin their long days of physical labor as children and never seem to stop. For example, Mr. Rustam Mamedov is 142 years of age. His wife is 116 years old. They have been married for 90 years. Mr. Mamedov has no intention of retiring from his life as a farmer. “Why? What else would I do?” he asks. All these people get healthful rewards from the environment in which they work. They all come from mountainous regions. They live and work at elevations (海拔) of 1,660 to 1,000 meters above sea level. The air has less oxygen and is pollution-free. This reduced-oxygen environment makes the heart and blood vessel (血管) system stronger.
Another factor that may contribute to the good health of these people is their isolation. To a great extent (程度), they are separated from the pressures and worries of industrial society. Inherited (遗传) factors also play some role. Most of the longest-living people had parents and grandparents who also reached very old ages. Good family genes may, therefore, be one factor in living longer.
| A．become weak and hopeless |
| B．benefit from physical work |
| C．are too old to work in the fields |
| D．are still working in the fields |
| A．Retiring from their lives as farmers. |
| B．Having been married for 90 years. |
| C．Hard physical work. |
| D．Having no intentions. |
| A．Clean mountain air. | B．Daily hard work. |
| C．Good genes | D．Stress and pressure. |
| A．the state of being separated | B．pressure |
| C．lack of physical labour | D．worry |
| A．Russian people live longer than Americans |
| B．People in the city live longer than those in the country |
| C．The reason why mountainous people live longer |
| D．Pressures and worries contribute to long life |
Chemical Safety
Procedures for handling chemical spills(泄露) and leaks.
Chemical spills and leaks can be broken down into two basic types: simple spills, which you can clean up yourself and complicated spills, which require outside assistance.
If your spill meets any of the following conditions, it is a complicated spill.
★A person is injured; or
★The identity of the chemical is unknown; or
★Multiple chemicals are involved; or
★The chemical is highly poisonous, flammable (可燃的) or reactive ; or
★The spill/leak occurs in a “public space” such as a corridor; or
★The spill/leak has the potential to spread to other parts of the building such as through the ventilation (通风) system; or
★The clean up procedures are not known or appropriate materials are not readily available; or
★The clean up requires a respirator (呼吸器) (including cartridge respirators) to be worn and no personnel have been trained and fit-tested in accordance(一致) with the campus Respiratory Protection Program; or
★The spill/leak may endanger the environment by reaching waterways or outside ground, or by going down a drain
If none of the above conditions are met, the spill is defined as a simple spill. You may clean up simple spills in accordance with Chapter 6 of the Chemical Safety Guide. For consultative assistance, call Division of Research Safety (DSR) at 333-2755.
| How to report a complicated spill Evacuate(撤退) to a safe location, and alert others to evacuate. Dial 9-911 from a campus phone. Tell the operator you are calling to report a chemical spill at the University of Illinois. Have the following information ready. Name of chemical Quantity spilled Location of spill (Full building name and room number) Number of people injured or slashed If applicable, the occurrence of a fire or explosion Your name and phone number 5. Have someone knowledgeable about the chemical spilled meet the fire department at the main entrance to your building. Take a Material Safety Data Sheet (MSDS) of the chemical, if it is readily available. |
| A．Some spilled liquid causes a fire in the building. |
| B．Yellow and green gases are leaking from the storage room. |
| C．An unknown red chemical is found on the corridor floor. |
| D．A researcher spills his milk all over the lab floor. |
| A．put on a respirator as soon as possible |
| B．refer to Chapter 6 of the Chemical Safety Guide |
| C．get away from the spill and report it to authorities |
| D．call Division of the Research Safety at 333-2755 |
| A．a mask | B．an explanation about the chemical |
| C．a device | D．another kind of chemical |
| A．Students in the Chemistry Department of a university. |
| B．Researchers working at Chemical Institution of Illinois. |
| C．Members of Division of Research Safety. |
| D．Staff members at a chemical manufacturing company. |
| A．inform people of the dangers of various chemical spills |
| B．introduce complicated spills and necessary measures in response to them |
| C．encourage students to join the campus Respiratory Protection Program |
| D．compare simple spills and complicated spills |
In China, if you are not married by the time you are 30, you are in for trouble social blame and pressure from family and friends can get you down. And if you are a woman, it’s even worse.
Many young people get married simply to get other people off their backs (免受别人的指责) . This is a serious compromise. One ends up not marrying the ideal partner.
There are, however, a few young people who refuse to compromise if they can’t find a good marriage partner, they say, they would rather not marry at all.
34-year-old Kate is a university lecturer in English. She said she would not describe herself as celibatarian (独身主义者) but simply a woman who hasn’t come across the right man yet. She has sharp comments for the way in which the old generation looks at marriage.
“Many people think marriage is a duty---to your parents, family and society. Nobody cares if your marriage is happy or not, she said, I think this is very wrong and I intend to live and act according to my own will.”
Happily for her, her parents are open-minded and not lay stress on her. But the same does not apply to her friends. They are constantly trying to get her together with some young man or another. She always refuses politely.The main idea of the passage is that
| A．marriage is a duty to society |
| B．people should get married before 30 years old |
| C．late marriage should be respected |
| D．women should get married earlier than men |
| A．she doesn’t think he is the right man she wants |
| B．he is either too old or too young |
| C．he is either important or little learned |
| D．he doesn’t have good manners |
| A．interested in | B．satisfied with |
| C．worried about | D．likely to suffer |
| A．In China, one may face social blame and family pressure if one hasn’t got married by 30. |
| B．Miss Kate’s parents are always worried about her marriage. |
| C．Miss Kate won’t compromise if she can’t have her ideal marriage. |
| D．Miss Kate wants to marry a worthy young man. |
| A．everybody will be happy and satisfied |
| B．nobody will pay attention to whether you are happy or not in your family life |
| C．you can easily find an ideal partner |
| D．young people will have nothing to worry about in marriage |
Three Central Texas men were honored with the Texas Department of Public Safety's Director's Award in a Tuesday morning ceremony for their heroism in saving the victims of a fiery two car accident.
The accident occurred on March 25 when a vehicle lost control while traveling on a rain-soaked State Highway 6 near Baylor Camp Road. It ran into an oncoming vehicle, leaving the occupants trapped inside as both vehicles burst into flames.
Bonge was the first on the scene and heard children screaming. He broke through a back window and pulled Mallory Smith, 10, and her sister, Megan Smith,9,from the wreckage.
The girls' mother, Beckie Smith, was not with them at the time of the wreck, as they were traveling with their baby sitter, Lisa Bow bin.
Beckie Smith still remembers the sickening feeling she had up on receiving the call informing her of the wreck and the despair as she drove to the scene.
Bozeman and Clemmons arrived shortly after Bonge and helped rescue the other victims and attempted to put out the fires.
"I was nervous," Bozeman said." I don't feel like I'm a hero. I was just doing what anyone should do in that situation. I hope someone would do the same for me."
Everyone at the accident made it out alive, with the victims suffering from nonlife-threatening injuries. Mallory Smith broke both femurs, and Megan had neck and back injuries. Bowbin is still recovering from a broken pelvis, ankle and foot.
The rescuers also were taken to the hospital and treated for cuts and smoke breathing, Bonge said.
In addition, Bozeman not to meet accident victim Anthony Rus so in the hospital after the accident, where Russo presented him with a glass frame inscribed with" Thank you," Bozeman said. Those involved in that fateful encounter on Highway 6 credited God blessing for bringing them together.
"Whatever the circumstances, Tuesday's ceremony provided a time to be grateful for those who put their lives on the line for the lives of complete strangers," Beckie Smith said," We're calling it The Miracle on Highway 6."Which of the following can be used to describe Bozeman?
| A．Kind. | B．Modest. | C．Excited. | D．Smart. |
Who saved Megan Smith from the damaged car?
| A．Clemmons. | B．Anthony Russo. |
| C．Bozeman. | D．Bonge. |
What's the main idea of the passage?
| A．Three persons were awarded for rescuing victims in a car accident. |
| B．Three ordinary people were regarded as great heroes. |
| C．Several victims were carried to safety from the burning cars. |
| D．A car accident occurred on a rain-soaked State Highway 6. |
It can be inferred from what Beckie Smith said that ____.
| A．she regarded the accident as a wonder |
| B．she was frightened by the serious accident |
| C．she thought highly of the rescuers |
| D．she called on others to learn from the rescuers |
Which of the following is true according to the passage?
| A．Luckily, no one received too serious injuries in the accident. |
| B．All the victims received slight injuries in the accident. |
| C．The rescuers were taken to the hospital to visit the victims. |
| D．The injured will soon recover from their injuries. |
粤公网安备 44130202000953号