Microwaves may be great at warming up food, but what about warming people?
Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furn
iture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Buffler of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (low-power microwave penetration in a ham is about 0.2 inches, for example) and with no negative effects.
To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 milliwatts per square centimeter (mw. /sq.cm.); a satisfactory feeling of warmth occurs between 35 and 50 mw./sq.cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw./sq.cm. And a frozen meat pie in your microwave oven receives about 1000 mw./sq. cm.
In houses of the future, each room could be provided with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector would turn on the magnetron, filling the room with low-power microwaves. In the same way that a microwaves oven heats up a hamburger, but not the plate it’s on, you would feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical.)
While it might be some time before homeowners are comfortable enough with the idea to set up whole body microwave heaters in houses, Buffler says microwaves may attract livestock farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves could warm the lambs safely and quickly. Which of the following can tell the main idea of the passage?
| A．A new heating system. | B．A new microwave oven. |
| C．A popular technique. | D．The magnetron. |
The test conducted by Buffler shows that when a person feels comfortable warmth, he receives about ____.
| A．20 mw. / sq. cm. | B．40 mw. / sq. cm. |
| C．60 mw. / sq. cm. | D．85 mw. / sq. cm. |
According to paragraph 4, which of the following fills the room with low-power microwaves?
| A．The magnetron. | B．The motion detector. |
| C．The microwave oven. | D．The radiation-absorbing chemical. |
Which of the following statements about microwave heaters would Buffler most probably agree with?
| A．Microwave heaters will soon be widely used by homeowners. |
| B．Microwave heaters sometimes make people feel uncomfortable. |
C．Microwave heaters will be probably first used by livestock farmers to prot ect their lambs in winter. |
| D．Microwave heaters cannot be accepted by the public because they are somewhat unsafe. |
An English traveler found himself in Norway with only enough money to buy the ticket for him to go back home. As he knew that it would take him only two days to get to England, he decided that he could easily spend the time without food. So he bought a ticket and got on the ship. The man closed his ears to the sound of the lunch bell. When dinnertime came, he didn't go to dinning room, saying that he was not feeling very well.
The next morning he still didn't have breakfast and at lunchtime he again stayed in his room. But at dinnertime he was so hungry that he went to the dinning room and ate everything the waiter put in front of him. He got ready for the quarrel (争执).
“Bring me the bill,” he said. “The bill, sir?” said the waiter in surprise. “There isn't any bill. On our ship meals are included (包括) in the money for the ticket,” said the waiter. The story happened _____.
| A．in England |
| B．on a ship from Norway to England |
| C．in Norway |
| D．on a ship from England to Norway |
The traveler didn’t go to the dinning room first because _____.
| A．he had no money |
| B．he didn’t feel very well |
| C．he didn’t want to eat anything |
| D．he didn’t hear the sound of the bell |
The traveler went to the dinning room to eat something because _____。
| A．his friend had given him some money |
| B．the waiter had asked him to change his mind |
| C．he learned that there was no bill on the ship |
| D．he was too hungry. |
After the traveler finished eating, _____.
| A．he had a quarrel with waiter over the bill |
| B．he drank a lot |
| C．he asked the waiter to bring him the change (零钱) |
| D．he came to know that travelers on the ship had free meals |
Not all bodies of water are so evidently alive as the Atlantic Ocean, an S-shaped body of water covering 33 million square miles. The Atlantic has, in a sense, replaced the Mediterranean as the inland sea of Western civilization. Unlike real inland seas, which seem strangely still, the Atlantic is rich in oceanic liveliness. It is perhaps not surprising that its vitality has been much written about by ancient poets.
“Storm at Sea”, a short poem written around 700, is generally regarded as one of mankind’s earliest artistic representations of the Atlantic.
When the wind is from the west
All the waves that cannot rest
To the east must thunder on
Where the bright tree of the sun
Is rooted in the ocean’s breast.
As the poem suggests, the Atlantic is never dead and dull. It is an ocean that moves, impressively and endlessly. It makes all kinds of noise—it is forever thundering, boiling, crashing, and whistling.
It is easy to imagine the Atlantic trying to draw breath—perhaps not so noticeably out in mid-ocean, but where it meets land, its waters bathing up and down a sandy beach. It mimics(模仿) nearly perfectly the steady breathing of a living creature. It is filled with symbiotic existences, too; unimaginable quantities of creatures, little and large alike, mix within its depths in a kind of oceanic harmony, giving to the waters a feeling of heartbeat, a kind of sub-ocean vitality. And it has a psychology. It has personalities: sometimes peaceful and pleasant, on rare occasions rough and wild; always it is strong and striking.Unlike real inland seas, the Atlantic Ocean is______.
| A．always energetic | B．lacking in liveliness |
| C．shaped like a square | D．favored by ancient poets |
What is the purpose of using the poem “Storm at Sea” in the passage?
| A．To describe the movement of the waves. |
| B．To show the strength of the storm. |
| C．To represent the power of the ocean. |
| D．To prove the vastness of the sea. |
What does the underlined word “symbiotic” mean?
| A．Living together. | B．Growing fast. |
| C．Moving harmoniously. | D．Breathing peacefully. |
In the last paragraph, the Atlantic is compared to______.
| A．a beautiful and poetic place | B．a flesh and blood person |
| C．a wonderful world | D．a lovely animal |
EDGEWOOD-EVERY morning at Dixie Heights High School, customers pour into a special experiment; the district’s first coffee run mostly by students with special learning needs.
Well before classes start, students and teachers order Lattes Cappuccinos and Hot Chocolates. Then, durning the first period teachers call in orders on their room phones, and students make deliveries.
By closing tome at 9.20 a.m., the shop usually sells 90 drinks.
“Whoever made the chi tea, Ms. Schatzman says it was good,” Christy McKinley, a second year student, announced recently, after hanging up with the teacher.
The shop is called the Dixie PIT, which stands for Power in Transition. Although some of the students are not disabled, many are, and the PIT helps them prepare for life after high school.
They learn not only how to run acoffee shop but also how to deal with their affairs. They keep a timecard and receive paychecks, which they keep in check registers.
Special-education teachers Kim Chevalier and Sue Casey introduced the Dixie PIT from a similar program at Kennesaw Mountain High School in Georgia.
Not that it was easy. Chevalier’s first problem to overcome was product-related. Should school be selling coffee? What about sugar content?
Kenton County Food Service Director Ginger Gray helped. She made sure all the drinks, which use non fat milk, fell within nutrition(营养) guidelines.
The whole school has joined in to help.
Teachers agreed to give up their lounge(休息室) in the mornings. Art students painted the name of the shop on the wall. Business students designed the paychecks. The basketball team helped pay for cups.What is the text mainly about?
| A．A best selling coffee. |
| B．A special educational program. |
| C．Government support for schools. |
| D．A new type of teacher- student relationship. |
The Dixie PIT program was introduced in order to _______.
| A．raise money for school affairs |
| B．do some research on nutrition |
| C．develop students’ practical skills |
| D．supply teachers with drinks |
We know from the text that Ginger Gray _______.
| A．manages the Dixie PIT program in Kenton Country |
| B．sees that the drinks meet health standards |
| C．teaches at Dixie Heights High School |
| D．owns the school’s coffee shop |
The displays of bad temper are nothing new in kindergarten and first grade, but the behavior of a 6-year-old girl this fall at a school in Fort Worth, Texas, had even the most experienced staff members wanting to run for cover. Asked to put a toy away, the youngster began to scream. Told to calm down, she knocked over her desk and crawled（爬行） under the teacher’s desk, kicking it and throwing out the contents of the drawers. Then things really began to worsen. Still screaming, the child stood up and began casting books at her terrified classmates, who had to be accompanied to safety.
Just a bad day at school? More like a bad season. The desk-throwing incident followed scores of other crazy acts by some of the youngest Fort Worth students at schools across the district, and even the country. There have been an increasing number of kindergartners and first-graders with violent behavior and it has become an alarming trend.
The youngest school kids are acting out in really ridiculous ways and violence is getting younger and younger. Why? Educators and psychologist argue that they are witnessing the result of a number of social trends that have come together in a most unfortunate way. Many mention economic stress, which has parents working longer hours than ever before, kids spending more time in day care and everyone coming home too tired to engage in the kind of relationships that build social skills. In addition, many educators worry about rising academic pressure in kindergarten and first grade as the students have to take the yearly tests demanded by the No Child Left Behind Act. They believe that even more important than early reading is the learning of play skills. Other experts also point out that violent behavior in children has been closely linked to exposure to violence on TV and in movies, video games and other media. They insist schools try to teach kids what they have failed to learn at home, for example, having varieties of anti-violence and character-education programs, instructing children to interact with people who love them and teaching them how to behave.The author leads in the topic of the passage with.
| A．detailed examples | B．scientific analysis |
| C．satisfactory evidence | D．rich imagination |
The second paragraph tells us that.
| A．autumn is considered as a bad season for the youngest school kids |
| B．Fort Worth students set good example to their peers in the district |
| C．the problem of kids’ violent behaviors is too serious to be ignored |
| D．kindergartners are urged to be equipped with alarming systems |
As for the children, which of the following results in their violent behavior?
a. economic stress
b. academic pressure
c. lack of interaction with parents
d. ill personality
e. exposure to media violence
| A．a, b, d | B．a, c, d |
| C．b, c, e | D．b, d, e |
The passage mainly discusses about.
| A．causes and solutions of school violent behaviors |
| B．student behavior management in the digital age |
| C．kids’ exposure to violence on TV and in movies |
| D．functions of character-education programs |
Expert Tricks on iPhone 5
We don’t want to change your phone, we wanna make you say, wow, that is a bigger change than I expected. iPhone 5 in a result of that desire to surprise. It’s been completely redesigned.
For the first time ever, we’ve increased the size of display by making the screen taller but not wider. You can see more of your content without the need to scroll. We are making scrolling the thing of the past. iPhone 5 is more comfortable to use and reduces scrolling tiredness when you are reading long documents.
Even with the larger display, iPhone 5 is the thinnest iPhone we ever built. To achieve the design this tall, we have to look at it and completely redesign the internal architecture. It’s 18% thinner and 79.5% taller than the previous iPhone.
It makes everything you do on iPhone 5 feels easier and just move your arm away. No more hidden menus, no confusing gestures. Everything is right at your fingertips.
The panorama feature(全景功能) is simply awesome. The ultra-HD widescreen display let you get your entire shot in a single snap. You can also use your iPhone 5’s innovative design for image stabilization.
With an iPhone this tall, reception has never been better. You enjoy crystal clear clarity on even the longest calls.
And of course, all your favorite applications are still available. In fact you will find your old favorites also benefit from the new handsome ultra-HD widescreen. We found while many previous iPhone owners were using Facetime, they only used it for the faces. That’s why we are introducing Bodytime. Using iPhone 5’s ultra-HD widescreen display, Bodytime let you see a person’s entire body, allowing you to detect mannerisms and defects like never before.
We look way beyond what our thoughts expect, it took all of our learning, all of our thinking to realize something so simple, so clear, and yet so tall.
iPhone 5, the tallest thing to happen to iPhone since iPhone.What can we learn about iPhone 5?
| A．It is taller, wider and thinner. |
| B．It is taller, wider and thicker. |
| C．It is taller, thinner but not wider. |
| D．It is shorter, wider and thinner. |
Which this new iPhone, you can do all the following EXCEPT .
| A．doing things easily on it by moving arm away |
| B．scrolling more quickly than before |
| C．getting the entire shot in a single snap |
| D．using Bodytime for a person’s entire body |
How thick is the redesigned iPhone 5 if the previous iPhone is 7.6mm in thickness?
| A．6.232mm. | B．1.558mm. |
| C．1.368mm. | D．6.042mm. |
What is the main idea of the passage?
| A．Bodytime will replace Facetime in the future. |
| B．Scrolling on the phone will be the thing of the past. |
| C．All your favorite apps are still available on the new iPhone. |
| D．iPhone 5 will be the tallest thing to happen. |