Even plant can run a fever, especially when they’re under attack by insects or disease. But unlike human, plants can have their temperature taken from 3, 000 feet away - straight up. A decade ago, adopting the infrared （红外线）scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide （杀虫剂）spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest （害虫）problems.
Even better, Paley’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3, 000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color - coded map showing where plants were running“ fevers”. Farmers could then spot - spray, using 50 to 70 percent less pesticide than they otherwise would.
The bad news is that Paley’s company closed down in 1984, after only three years. Farmers resisted the new technology and long - term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works. “This technique can be used on 75 percent of agricultural land in the United States, ” says George Oerther of Texas A & M. Ray Jackson , who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only ff Paley finds the financial backing which he failed to obtain 10 years ago.
56．Plants will emit an increased amount of heat when they are________.
A. sprayed with pesticides B. facing an infrared scanner
C. in poor physical condition D. exposed to excessive sun rays
57．In order to apply pesticide spraying precisely, we can use infrared scanning to________.
A. estimate the damage to the crops B. measure the size of the affected area
C. draw a color -coded map D. locate the problem area
58．Farmers can save a considerable amount of pesticide by________.
A. resorting to spot – spraying B. consulting infrared scanning experts
C. transforming poisoned rain D. detecting crop problems at an early stage
59．The application of infrared scanning technology to agriculture met with some difficulties________.,
A. the lack of official support B. its high cost
C. the lack of financial support D. its failure to help increase production
60．Infrared scanning technology may be brought back into operation because of________.
A. the desire of farmers to improve the quality of their produce
B. growing concern about the excessive use of pesticides on crops
C. the forceful promotion by the Department of Agriculture
D. full support from agricultural experts
Teen Climbing Camp 2010
This 5-day climbing camp is suitable for teenagers between the ages of 13 and 18 who have an interest in rock climbing. The climbing days are designed for beginners and those who have some basic experience in a gym or outdoors. Participants will find themselves challenged physically and mentally.
Rock Dimensions camps are designed to be a positive and memorable experience by providing healthy communication between participants, individual goal setting, and challenges that lead to personal growth.
Dates
Monday, June 29-Friday, July 3
Monday, July 27-Friday, July 31
Locations
Climbing Tower at Footsloggers
Linville Gorge and Table Rock area
Local climbing areas near Boone
Responsibilities
Participants will meet Rock Dimensions guides at our location each morning and at the end of each day. Rock Dimensions will provide all climbing items, including a safety rope, a helmet and climbing shoes for each participant. Participants are responsible for bringing their own lunch, water, small backpack, appropriate clothing, and personal items like sun cream, etc.
Pre-camp planning
Participants will receive the following information in their registration(注册) packet Medical Form, Responsibility Agreement, Clothing/Equipment List, and Directions.
Cost
$575/person for the 5-day camp
$325/person for the first 3 days
Anyone interested in participating in just the last two days of the camp should call to discuss pricing and necessary skills/experience.According to the text, Rock Dimensions camps will _______.
| A．probably impress participants deeply |
| B．provide a few competitions |
| C．help the participants set their life goals |
| D．check the records of personal growth |
What of the following do participants need to bring with them?
| A．A safety rope. | B．A helmet. | C．Climbing shoes. | D．Appropriate clothing. |
If Paul wants to participate in the climbing camp from July 27 to July 29 and his brother from July 27 to July 31, it will cost them _______.
| A．575 dollars | B．650 dollars | C．900 dollars | D．1,150 dollars |
What can we infer from the text?
| A．Some experience is required of the participants. |
| B．It’ll be hard for teens to experience the climbing. |
| C．Parents are required to stay with their children. |
| D．Guides will talk about the prices with parents. |
How the Grand Canyon (大峡谷) was created remains one of the geology’s greatest mysteries. Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years. But volcanic rock samples taken from the canyon now suggest that the canyon was down-cut instead.
Down-cutting is when a flood of water rushes over a landscape (地形) with enough force to cut deeply into the ground and leaves behind a canyon. Such a flood is usually released when a natural or man-made dam (堤坝) bursts.
Robert Webb, a research geologist, says natural dams seem to have formed and broken across the Colorado River several times during the last million years. The dams were built when lava(熔岩) from the eruptions of nearby volcanoes flowed into the river. The lava hardened into hard rocks and blocked the river, causing it to back up and form a lake. Each time the lake grew so huge that it broke the rock dam, releasing a flash flood that furthered the down-cutting process and deepened the canyon.
Down-cutting is not just an earthly event. Satellite photos sent back from Mars suggest that the process has happened there, too, say many other researchers.
The photos, taken by the Mars Global Surveyor, indicate that an enormous lake existed on Mars 3.5 billion years ago. The lake spilled into a large nearby hole. One edge of the hole broke, releasing a flash flood that quickly carved out a grand canyon.
The existence of down-cutting on Mars is just one more piece of evidence that the cold, dry planet was once warm and wet.In the past, deep canyons were believed to have formed _______.
| A．as a result of a sudden break of volcanoes |
| B．due to river flows over millions of years |
| C．owing to the burst of artificial dams |
| D．thanks to our ancestors’ creative work |
According to the passage, which of the following statements is TURE?
| A．Several volcanoes broke out on Mars directly creating grand canyons. |
| B．Several great lakes existed on the upper parts of the Colorado River. |
| C．People built high dams on the upper parts of the Colorado River. |
| D．The Colorado River crossed the Grand Canyon to form down-cutting. |
From the last three paragraphs we learn that _______.
| A．there are great lakes on Mars |
| B．there are active volcanoes on Mars |
| C．there might be cities on Mars |
| D．there might be life on Mars |
The passage can be titled as _______.
| A．Lakes on Earth and Mars |
| B．The Cause of Lake Formation |
| C．The Force of Dam Breaking |
| D．Canyons—Results of Flood Cutting |
A man, who sometimes takes my bus, is in rags. His life seems different from that of the others. He looks exhausted and carries nothing. He appears along a downtown street, seemingly out of nowhere. We sometimes want to know where he sleeps at night.
A few weeks ago he boarded the bus. A few stops later, a young woman boarded. She swiped (刷) her bus-card, only to find the machine would not accept it. The driver told her to pay the $2.25 fare. “I just bought this card,” she said. “I paid the money...”
The driver said she could take the card back to the sales office and explain the problem. In the meantime she would have to pay the fare for that day. The woman became confused and distressed. The rest of us just watched, wondering how the problem would be solved. Suddenly the man rose from his seat, dropped a few coins into the fare box.
“You’re lucky,” the bus driver said quietly. “He paid for you.” Silence fell over the bus. The rest of us had watched the woman’s discomfort, but he felt it. We lawyers, journalists and business people headed downtown to help fix the world. He fixed her world.
I haven’t seen him since that day. Some people believe angels occasionally drop down and move among us. All I know is that I have a new respect for the simple act of kindness. It speeds us along on our way.According to the first paragraph, the author _______.
| A．thinks highly of the man | B．often gives the man some help |
| C．knows the man very well | D．considers the man strange |
What does the underlined word “distressed” probably mean?
| A．exited | B．generous | C．bored | D．anxious |
What did the writer learn from the man?
| A．to show concern for other people. |
| B．to lead a happy life like the man. |
| C．to share what he has with us. |
| D．to believe that people are born kind. |
I was puzzled! Why was this old woman making such a fuss about an old copse（矮林） which was of no use to anybody? She had written letters to the local paper, even to a national, protesting about a projected by-pass to her village, and, looking at a map, the route was nowhere near where she lived and it wasn’t as if the area was attractive. I was more than puzzled, I was curious.
The enquiry into the route of the new by-pass to the village was due to take place shortly, and I wanted to know what it was that motivated her. So it was that I found myself knocking on a cottage door, being received by Mary Smith and then being taken for a walk to the woods. “I’ve always loved this place,” she said, “it has a lot of memories for me, and for others. We all used it. They called it ‘Lovers lane’. It’s not much of a lane, and it doesn’t go anywhere important, but that’s why we all came here. To be away from people, to be by ourselves. ” she added.
It was indeed pleasant that day and the songs of many birds could be heard. Squirrels watched from the branches, quite bold in their movements, obviously few people passed this way and they had nothing to fear. I could imagine the noise of vehicles passing through these peaceful woods when the by-pass was built, so I felt that she probably had something there but as I hold strong opinions about the needs of the community over-riding the opinions of private individuals, I said nothing. The village was quite a dangerous place because of the traffic especially for old people and children, their safety was more important to me than an old woman’s strange ideas.
“Take this tree,” she said pausing after a short while. “To you it is just that, a tree. Not unlike many others here.” She gently touched the bark, “Look here, under this branch, what can you see?”
“It looks as if someone has done a bit of carving with a knife.” I said after a cursory inspection.
“Yes, that’s what it is!” she said softly.
She went on, “He had a penknife with a spike for getting stones from a horse's hoof, and I helped him to carve them. We were very much in love, but he was going away, and could not tell me what he was involved in the army. I had guessed of course. It was the last evening we ever spent together, because he went away the next day, back to his Unit.”
Mary Smith was quiet for a while, then she sobbed. “His mother showed me the telegram. ‘Sergeant R Holmes …Killed in action in the invasion of France.’…”
“I had hoped that you and Robin would one day get married.” she said, “He was my only child, and I would have loved to be a Granny, they would have been such lovely babies’- she was like that! ”
“Two years later she too was dead. ‘Pneumonia (肺炎), following a chill on the chest’ was what the doctor said, but I think it was an old fashioned broken heart. A child would have helped both of us.”
There was a further pause. Mary Smith gently caressed the wounded tree, just as she would have caressed him. “And now they want to take our tree away from me.” Another quiet sob, then she turned to me. “I was young and pretty then, I could have had anybody, I wasn’t always the old woman you see here now. I had everything I wanted in life, a lovely man, health and a future to look forward to.”
She paused again and looked around. The breeze gently moved through the leaves with a sighing sound. “There were others, of course, but no one can match my Robin!” she said strongly. “And now I have nothing - except the memories this tree holds. If only I could get my hands on that awful man who writes in the paper about the value of the road they are going to build where we are standing now, I would tell him. Has he never loved, has he never lived, does he not know anything about memories? We were not the only ones, you know, I still meet some who came here as Robin and I did. Yes, I would tell him!”
I turned away, sick at heart.The main purpose of this passage is to ________.
| A．draw attention to the damage that wars cause |
| B．persuade people to give up private interest |
| C．arouse the awareness of being environmentally friendly |
| D．introduce a touching but sad love story |
Which of the following words can best describe Mary Smith?
| A．Selfish. | B．Faithful. | C．Changeable. | D．Stubborn. |
The underlined sentence “I felt that she probably had something there” means ________.
| A．I thought there might be something hidden in the woods by Mary Smith |
| B．I guessed there might be a story related with Mary Smith |
| C．I thought there might be some reason for Mary Smith’s protest |
| D．I guessed there might be a secret purpose of Mary Smith. |
What was probably the carving on the wounded tree?
| A．The date when Robin Holmes would leave for army. |
| B．Their wish that this place and tree would last long. |
| C．Their names and a heart with a sign of arrow through it. |
| D．Their protest against the war which tore them apart. |
In Mary’s opinion, which of the following might have caused Robin’s mother’s death?
| A．Pneumonia | B．A chill on the chest | C．A heart attack | D．Severe sorrow |
The “tree” probably stands for ________.
| A．her romance . | B．her determination | C．her sadness | D．her dream |
It was reported last week that developers could take photos from Apple mobile and Google Android devices without the phone owners knowing that the images were being taken. In Apple’s case, developers can also obtain the location information for each photo.
Senator(参议员) Charles Schumer said in a telephone interview that his office had spoken with officials at both Apple and Google on Monday.
“We asked them if they could find a way on their own to prevent Apple from having access to private information,” Mr. Schumer said. “They were friendly and open to the idea that this ought to be changed.”
On Sunday, Mr. Schumersaidthat he planned to send a letter to the Federal Trade Commission asking the agency to investigate Apple and Google after the privacy concerns came to light.Claudia Bourne Farrell, an F.T.C. spokeswoman, said the agency had received the letter but she could not comment further.
“It worries people to think that one’s personal photos, address book, and who knows what else can be obtained and even posted online without permission,” Mr. Schumer wrote in his letter to the F.T.C. “If the technology exists to open the door to this kind of privacy invasion, then surely technology exists to close it, and that’s exactly what must happen.”
Mr. Schumer said if Apple and Google could not come to an agreement to fix the problem, then he would be forced to take the issue further.
He said other companies had been willing to work with his office to fix issues. “I’m optimistic that we can get this changed without any regulation,” he said. “If it’s not changed, then we’ll turn to the F.T.C., and if that doesn’t work then we’ll consider legal approach.”
The F.T.C. has warned companies to try to be morevigilant(警醒的)in their efforts to protect consumers when it comes to privacy.The senators spoke with officials at both Apple and Google___________.
| A．to urge them not to invade consumers’ privacy |
| B．to discuss whether it is illegal to have access to private information |
| C．to stop them from developing the technology of taking photos |
| D．to keep them from obtaining the location information for each photo |
Which of the following statements is TRUE?
| A．Privacy invasion from Apple has existed for a long time. |
| B．Mr. Schumer takes the privacy concerns caused by Apple and Google seriously. |
| C．Privacy invasion from Google has existed for a long time. |
| D．Apple and Google have decided to make a change. |
Mr. Schumer’s letter to the F.T.C. mainly shows that the technology to open the door to privacy invasion___________.
A. causes privacy invasion to happen frequently
B. can be used if permitted
C. causes people to worry about the safety of their personal information
D. causes personal information to be posted online without permissionIf the privacy concerns can’t be solved with the help of the F.T.C., ___________.
A. The senators will force the companies not to invade privacy
B. The companies will be closed
C. The companies will be fined
D. The senators will turn to lawWhere can we read about the passage?
| A．In a newspaper. | B．In a travel brochure. |
| C．In a science report. | D．In a textbook. |