To extinguish (熄灭) different kinds of fires, several types of fire extinguishers have been invented. They must be ready for immediate use when fire breaks out. Most portable (手提式的) kinds operate for less than a minute, so they are useful only on small fires. The law requires ships, trains, buses and planes to carry extinguishers.
Since fuel, oxygen (氧气) and heat must be present in order for fire to exist, one or more of these things must be removed or reduced to extinguish a fire. If the heat is reduced by cooling the material below a certain temperature, the fire goes out. The cooling method is the most common way to put out a fire. Water is the best cooling material because it is low in cost and easy to get.
Another method of extinguishing fire is by cutting off the oxygen. This is usually done by covering the fire with sand, steam or some other things. A blanket may be used do cover a small fire.
A third method is called separation, which includes removing the fuel, or material easy to burn, from a fire, so that it can find no fuel.
The method that is used to put out a fire depends upon the type of fire. Fires have been grouped in three classes. Fires in wood, paper, cloth and the like are called Class A fires. These materials usually help keep the fire on. Such fires can be stopped most readily by cooling with water.
68. If a fire breaks out on a bus, which of the follow should be ready there for you to use?
A. Sand B. Water C. A blanket. D. An extinguisher.
69. To cover a small piece of burning wood with a basin in order to stop the fire is an example of .
A. separating the fire B. reducing the heat
C. removing the fuel D. cutting off the oxygen
70. In choosing how to put out a fire, we should first be clear about .
A. when it breaks out B. how it comes about
C. what kind it is D. where it takes place
71. What would the author probably discuss in the paragraph that follows?
A. Another class of fires B. Another type of extinguishers
C. How fires break out. D. How fires can be prevented.
While some scientists overlook the existence of a sixth sense for danger, a new research from Washington University in St. Louis has discovered a brain area that clearly acts as an early warning system and helps us adjust our behavior to avoid dangerous situations.
"Our brains are better at picking up not obvious warning signs than we previously thought," said Joshua Brown, a PhD in psychology in the issue of the journal Science.
The findings offer exact scientific evidence for a new way to form a concept of the complex control processes taking place in and around the ACC, a brain area located near the top of the frontal lobes(耳垂) and along the walls that divide the left and right hemispheres(大脑半球).
"In the past, we found activity in the ACC when people had to make a difficult decision, or after they make a mistake," Brown said. "But now we find that this brain area can actually learn to recognize when you might make a mistake, even before a difficult decision has to be made. So the ACC appears to act as an early warning system—— it learns to warn us in advance when our behavior might lead to a negative outcome, so that we can be more careful and avoid making a mistake."
By providing a clearer picture by which we self monitor and control our behavior, the study is an important step in efforts to develop more effective treatments for mental illnesses. It also provides a new way of understanding inappropriate behaviors that often accompany mental illnesses.
"Our results suggest how injury of the ACC can lead to breakdowns in the early warning system, so that the brain fails to stop or control inappropriate behavior ahead of time," said Brown. "On the other hand, in those persons with mental disorder, the ACC might warn us of an upcoming problem even when no problem is in the existence."
Known to be an important part of the brain's control system, the ACC is believed to help adjust between cold, hard, fact-based reasoning and emotional responses, such as love, fear or expectation.According to the passage, the ACC____________.
| A．refers to the sixth sense for danger |
| B．deals with obvious warning situations |
| C．connects the left and right hemispheres |
| D．sends warning messages in advance |
The new research is beneficial because it ________ .
| A．provides a new way of avoiding mistakes |
| B．adjusts emotional responses in time of danger |
| C．helps find better treatments for mental illnesses |
| D．assists people in predicting and avoiding danger |
The new research helps us understand _________.
| A．why we are likely to make mistakes when the ACC is badly injured |
| B．why people with illnesses usually have so many strange behaviors |
| C．how the ACC works when something dangerous happens |
| D．how our brain warns us of failure in advance |
Singles' Day ---- the Chinese opposite of Valentine’s Day has turned into a massive online shopping event. It is a day when single people are supposed to buy themselves presents. But there are sociological reasons behind China's “celebration” of single life. And the imbalance could have big consequences for the country.
There were 34 million more men than women in China in 2011. Part of that is natural – usually there are 105 boys born for every 100 girls. But the Chinese gender ratio (性别比例) at birth is much more obvious. It was 116 boys to 100 girls in 2012. The one child policy is largely to blame. Brought in to limit population expansion, the policy allows only one child per family. But because male children are seen as more valuable, as well as more likely to support their parents in old age, some parents choose to have a son over a daughter. The result is that large numbers of men will likely never get married. In fact, one study has predicted that by 2030, 1 in 5 Chinese men in their 30s will never have married, while another states that 94% of unmarried people in China are men.
Traditionally, China has seen high levels of marriage, usually among the young. Besides, the increased education and career opportunities for women have meant that marriages are happening later. It is also traditional that women often marry men of a higher socioeconomic status than themselves. So women at the top and men at the bottom find themselves alone. One study has even suggested a link between an imbalanced gender ratio and growth in violent crime in the country.
Singles’ Day can’t solve all the problems China’s singles face. Indeed, it is possible that it is causing even more problems, as men resort to increasingly risky lines of work to increase their chances of gaining money and thus a wife. I am worried that as money starts to overcome romance, there is evidence that China ' s marriage market is increasingly materialistic.In 2012, if 50 girls were born, how many boys were probably born?
| A．50. | B．52. | C．58. | D．60. |
What made women in China get married late?
| A．Their support of the government’s late marriage policy. |
| B．Their higher education level and more work chances. |
| C．That they expect to enjoy their single time when young. |
| D．That there are too many excellent young men to choose from. |
What’s the writer’s attitude to the imbalance gender ratio in China?
| A．Optimistic | B．Concerned |
| C．Indifferent | D．Unknown |
We can learn from the passage that .
| A．Singles' Day is celebrated all over the world. |
| B．by 2030, 1 in 5 Chinese women in their 30s will be out of marriage. |
| C．an imbalanced gender ratio is related to the growth in violent crime. |
| D．Singles' Day will solve all the problems China’s singles face. |
The world's first hamburger doesn't come from where you think it comes from. It wasn't invented in the United States, and it didn't originate in Germany. No, the world's first hamburger comes from China.
If you're scratching your head right now, you're not alone. But Chinese hamburgers are very real and they definitely predate the hamburgers we call our own in the U.S. Known as rou jia mo, which translates to "meat burger" or "meat sandwich", they consist of chopped meat inside a pita-like bun, and they've been around since the Qin Dynasty, from about 221 BC to 207 BC. Despite the differences between this Chinese street food and our American-style burgers, the rou jia mo has been called the world's first hamburger.
The rou jia mo originated in the Shanxi Province of China, and is now eaten all over the country. It's typically prepared and eaten on the street. The dough for the bun, or mo, consists of a simple mixture of wheat flour, water and maybe yeast. Of course recipes may vary, but this basic equation makes for a chewy and subtle pillow for the delicious filling. While the mo is traditionally baked in a clay oven, today it's often fried in a pan. They may look a little like Chinese steamed buns or baozi, but the dough for those are, of course, steamed, not baked or fried.
The meat filling might consist of chopped pork, beef, lamb or chicken that has been stewed with a variety of spices, like ginger, cloves, coriander and star anise. You might also find herbs like cilantro or greens like lettuce garnishing the sandwich.What does the underlined word mean?
| A．noodle | B．food | C．bread | D．beverage |
Which of the following is TRUE?
| A．The mo people eat today is baked in a clay oven. |
| B．The world's first hamburger which was originated in the Shanxi Province of China is popular around the world. |
| C．The rou jia mo has a history of more than 2200 years. |
| D．The rou jia mo and American-style burgers share a similar cooking process. |
What would be the best title for the passage?
| A．Delicious hamburger |
| B．How to cook hamburger |
| C．Chinese invented hamburger |
| D．History of hamburger |
Most of us are expecting high-quality customer service in our daily life, but actually enjoying a happy purchase is easier said than done.
Shoppers seldom complain to the manager or owner of a retail store, but instead they will alert their friends, relatives, co-workers, strangers—and anyone who will listen.
Store managers are often the last to hear complaints, and often find out only when their regular customers decide to frequent their competitors, according to a study jointly conducted by Verde Group and Wharton School.
“Storytelling hurts retailers and entertains consumers,” said Paula Courtney, President of the Verde Group. “The store loses the customer, but the shopper must also find a replacement.”
On average, every unhappy customer will complain to at least four others, and will no longer visit the specific store. For every dissatisfied customer, a store will lose up to three more due to negative review. The resulting “snowball effect” can be disastrous to retailers.
According to the research, shoppers who purchased clothing encountered the most problems. Ranked second and third were grocery and electronic customers.
The most common complaints include filled parking lots, cluttered (塞满了的) shelves, overloaded racks, out-of-stock items, long check-out lines, and rude salespeople.
During peak shopping hours, some retailers solved parking problems by getting moonlighting (业余兼职的) local police to work as parking attendants. Some hired flag wavers to direct customers to empty parking spaces. This guidance eliminated the need for customers to circle the parking lot endlessly, and avoided confrontation between those eyeing the same parking space.
Retailers can relieve the headaches by redesigning store layouts, pre-stocking sales items, hiring speedy and experienced cashiers, and having sales representatives on hand to answer questions.
Most importantly, salespeople should be diplomatic and polite with angry customers.
“Retailers who’re responsive and friendly are more likely to smooth over issues than those who aren’t so friendly,” said Professor Stephen Hoch. “Maybe something as simple as a greeter at the store entrance would help.”
Customers can also improve future shopping experiences by filing complaints to the retailer, instead of complaining to the rest of the world. Retailers are hard-pressed to improve when they have no idea what is wrong.Why are store managers often the last to hear complaints?
| A．Most customers won’t bother to complain even if they have had unhappy experiences. |
| B．Customers have no easy access to store managers. |
| C．Few customers believe the service will be improved. |
| D．Customers would rather relate their unhappy experiences to people around them. |
What does Paula imply by saying “the shopper must also find a replacement” ?( Para. 4)
| A．New customers are bound to replace old ones. |
| B．Most stores provide the same kind of service. |
| C．Not complaining to manager causes the shopper some trouble too. |
| D．It is not likely the shopper can find the same products in other stores. |
Shop owners often hire moonlighting police as parking attendants so that shoppers________.
| A．can stay longer browsing in the store |
| B．won’t have trouble parking their cars |
| C．won’t have any worrier about security |
| D．can find their cars easily after shopping |
What contributes most to smoothing over issues with customers?
| A．Design of store layout. |
| B．Hiring of efficient employees |
| C．Huge supply of goods for sale. |
| D．Manners of the salespeople. |
To achieve better shopping experiences, customers are advised to ________.
| A．exert pressure on stores to improve their service |
| B．voice their dissatisfaction to store managers directly |
| C．settle their disputes with stores in a diplomatic |
| D．shop around and make comparisons between stores |
Thousands of hungry birds left the countryside of Britain in the bitter winter to find food and warmth in urban gardens. The move included species such as the redwing and the fieldfare, almost unknown outside rural areas
The hard situation of farmland birds has been revealed in the latest survey of bird populations from the Royal Society for the Protection of Birds released today.
The redwing has an obvious stripe over the eye and a red flash on the flanks (侧翼), while the fieldfare has a grey head, a peach underbelly, and a distinctive dark band on the tail.
Graham Madge, the society's spokesman, says, “For many urban birdwatchers the sight of these striking species is a real treat. Many people have never imagined there being such an amazing chance.”
“Frozen ground prevented them from getting food in the countryside and they have been saved from starvation in towns，” he added.
He says the unusual sight this year somewhat tempered the frustration felt at the suffering of small garden birds such as robins and wrens. These birds are sensitive to cold and must eat almost continuously to stay alive. Data from people who took part in the society's Big Garden Birdwatch recorded sightings in 280，000 gardens during the last weekend of January, with the goldcrest down 75 percent, the longtailed tit down 27 percent, and the coal tit down 20 percent. The study highlighted the need for food to be left out for birds during winter.
The redwing and the fieldfare are relatively unknown outside the eastern part of the country. The research shows, however, that they moved to the other side of the country where the climate is generally mild in winter and that many for the first time have reached Cornwall and Isles of Scilly. The number of redwing sightings was up 185 percent, those of the fieldfare 73, and of the yellowhammer 68.
Another surprise garden “guest” this year was the blackcap. This robinsized, silvergrey bird was rare in Britain 50 years ago, but increasing numbers now arrive each year from Germany and Austria.How did the urban birdwatchers probably feel when seeing the hungry birds?
| A．Excited. | B．Worried. |
| C．Annoyed. | D．Motivated. |
Which of the following can best replace the underlined word “tempered”？
| A．Prevented. | B．Relieved. |
| C．Explained. | D．Increased. |
According to the passage, Cornwall is perhaps ________．
| A．a village in eastern Britain |
| B．a city in western Britain |
| C．a village in western Britain |
| D．a city in eastern Britain |
What does the passage mainly talk about?
| A．The tough living conditions of some British birds. |
| B．The various species of Britain's garden birds. |
| C．The changes of some bird's population in Britain. |
| D．Unusual bird visitors in Britain's urban gardens. |