PERTH—Search crews will send a submarine(潜航器)deep into the Indian Ocean on Monday for the first time to try to determine whether signals detected by sound-locating equipment are from the missing Malaysian plane's black boxes, the Australian head of the search said.
Angus Houst on said the crew on board the Ocean Shield will send the underwater vehicle sometime Monday evening. The Bluefin 21 submarine can create a sonar(声呐)map of the area to chartany wreckage(残骸)on the seafloor.
The move comes after crews picked up a series of underwater sounds over the past two weeks that were consistent with an aircraft's black boxes.
“We haven’t had a single detection in six days, and l guess it’s time to go under water,” said Houston.
“Analysis of the four signals has reduced the search area on the ocean floor. The experts have therefore determined that the Australian Defense Vessel Ocean Shield will stop searching with the Towed Pinger Locator(拖曳声波定位仪)later today and use the underwater vehicle Bluefin 21 as soon as possible," he said at a news conference in Perth.
But Houston warned the switch to the submarine will not automatically "result in the detection of the aircraft wreckage. It may not.”
He said the submarine will take 24 hours to do each task, including two hours to dive, 16 hours to search the bottom, then two more hours hack up and four hours to download data.
Recovering the plane's flight data and cockpit(飞行员座舱)voice recorders is necessary For investigators to try to figure out what happened to Flight 370, which disappeared on March 8.
Houston said the search using the submarine will be a slaw and painstaking process.
The submarine takes six times longer to cover the same area as the pinger locator,and will need about six weeks to two months to examine the present underwater zone. The signals are also coming from 4,500 meters (15,000 feet) below the surface, which is the deepest the submarine can dive.
1.The submarine will be sent deep into the Indian Ocean on Monday to _____ .
A. create a sonar trap of the area
B. pick up underwater sounds
C. see if the signals detected are from the target black boxes
D. reduce the search area on the ocean floor
2.According to the passage, the submarine_______ .
A. will download data of the black boxes
B. can find the aircraft wreckage within 24 hours
C. will recover the plane's flight data and voice recorder
D. can dive to a depth of no more than 4,500 meters
3.The underlined sentences in the passage indicate that______.
A. the switch of the submarine may not function properly
B. the Ocean Shield will switch to submarine when it is necessary
C. the submarine will detect the wreckage of the plane automatically
D. the detection of the wreckage can't be guaranteed by using the submarine
4.The search will be a slow and painstaking process, mainly because _____ .
A. the underwater sounds were consistent with an aircraft's black boxes
B. the submarine travels slowly and the ocean is deep
C. they haven't had a single detection in six days
D. Ocean Shield stops searching wine the towed pinger locator
高三英语阅读理解困难题
PERTH—Search crews will send a submarine(潜航器)deep into the Indian Ocean on Monday for the first time to try to determine whether signals detected by sound-locating equipment are from the missing Malaysian plane's black boxes, the Australian head of the search said.
Angus Houst on said the crew on board the Ocean Shield will send the underwater vehicle sometime Monday evening. The Bluefin 21 submarine can create a sonar(声呐)map of the area to chartany wreckage(残骸)on the seafloor.
The move comes after crews picked up a series of underwater sounds over the past two weeks that were consistent with an aircraft's black boxes.
“We haven’t had a single detection in six days, and l guess it’s time to go under water,” said Houston.
“Analysis of the four signals has reduced the search area on the ocean floor. The experts have therefore determined that the Australian Defense Vessel Ocean Shield will stop searching with the Towed Pinger Locator(拖曳声波定位仪)later today and use the underwater vehicle Bluefin 21 as soon as possible," he said at a news conference in Perth.
But Houston warned the switch to the submarine will not automatically "result in the detection of the aircraft wreckage. It may not.”
He said the submarine will take 24 hours to do each task, including two hours to dive, 16 hours to search the bottom, then two more hours hack up and four hours to download data.
Recovering the plane's flight data and cockpit(飞行员座舱)voice recorders is necessary For investigators to try to figure out what happened to Flight 370, which disappeared on March 8.
Houston said the search using the submarine will be a slaw and painstaking process.
The submarine takes six times longer to cover the same area as the pinger locator,and will need about six weeks to two months to examine the present underwater zone. The signals are also coming from 4,500 meters (15,000 feet) below the surface, which is the deepest the submarine can dive.
1.The submarine will be sent deep into the Indian Ocean on Monday to _____ .
A. create a sonar trap of the area
B. pick up underwater sounds
C. see if the signals detected are from the target black boxes
D. reduce the search area on the ocean floor
2.According to the passage, the submarine_______ .
A. will download data of the black boxes
B. can find the aircraft wreckage within 24 hours
C. will recover the plane's flight data and voice recorder
D. can dive to a depth of no more than 4,500 meters
3.The underlined sentences in the passage indicate that______.
A. the switch of the submarine may not function properly
B. the Ocean Shield will switch to submarine when it is necessary
C. the submarine will detect the wreckage of the plane automatically
D. the detection of the wreckage can't be guaranteed by using the submarine
4.The search will be a slow and painstaking process, mainly because _____ .
A. the underwater sounds were consistent with an aircraft's black boxes
B. the submarine travels slowly and the ocean is deep
C. they haven't had a single detection in six days
D. Ocean Shield stops searching wine the towed pinger locator
高三英语阅读理解困难题查看答案及解析
Mary, together with her parents, were into the deep forest in ______ search of rare plants when ______ three were exposed to a big bear.
A. the; the B. /;the C. /; / D. the; /
高三英语单项填空中等难度题查看答案及解析
The rising frequency for smoggy days puts me into deep that maybe one day citizens will have to rely on masks to survive.
A. doubt B. worry C. shock D. faith
高三英语单项填空中等难度题查看答案及解析
When will the man leave for Perth?
A. On May 24th. B. On May 26th. C. On May 27th.
高三英语短对话中等难度题查看答案及解析
阅读下面短文,将标有A~F的段落或句子插入文章中题号的恰当位置,使全篇文章意义完整,结构连贯。
注意:有一个选项是多余的。
Deep into the night, the bus pulled into a Howard Johnson’s restaurant and everybody got off the bus except Tom. 1.perhaps he was a sea captain; maybe he had run away from wife; 2.. When they went to bus, one of the girls sat beside him and introduced herself. After a long time, slowly and painfully, be began to tell his story. He had been in prison in New York for the last four years, and he was going home.
“Well, when I was in prison I wrote to my wife. I said, Martha, I understand if you can’t stay married to me. I said I was going to be away a long time, and that if she couldn’t stand it, if the kids kept asking questions, if it hurt her too much, well, she could just forget me. Get a new young man—she’s wonderful woman—and forget all about me. 3.Not for the three and a half years.”
“Last week, when I was sure freedom was coming through, I wrote to her. I told her that if she had a new young man , I would understand.4.We used to live in this town, Brunswick ,and there’s great big oak tree just as you come in to the town. I told her if she would take me back, she should put a yellow handkerchief on the tree, and if she didn’t want me, forgot me, no handkerchief and I’d keep going on through.”
5.When they were 20 miles from Brunswick, the young man took over window seats on the right side, waiting for the approach of the great oak tree. Tom stopped looking, tightening his face into the ex-con’s mask. Then it was 10 miles, and then five, and the bus became very quiet.
Then suddenly all of the young people were up out of their seats, screaming and shouting and crying, doing small dances, except Tom.
A.You know, I love my wife deeply.
B.But if she didn’t, if the would take me back, she should let me know.
C.The young people began to wonder about him, trying to imagine his life;
D.Soon all the others were in it.
E.I told her she didn’t have to write to me, and she didn’t.
F.he could be an old soldier going home.
高三英语信息匹配困难题查看答案及解析
A. Get into the car. B. Carry the bags.
C. Hurry to drive the car. D. Search for the bags.
高三英语短对话简单题查看答案及解析
Chefs typically toss(抛)the frying food into the air from deep, rounded pans or woks before catching it again. Launching rice and its fixings allows a chef to cook it over really hot flames without burning. At times, temperatures in a pan can reach 1,200。 Celsius. 1.
Scientists found that the chefs relied on a specific pattern of motion. And they repeated those motions about three times a second. 2. At the same time the wok was rocked to and fro. The chefs used the edge of the stovetop as a fulcrum(支点)on which to balance as they rocked it.
Cooks use similarly complex patterns of movement to cook up other foods. 3.
Scientists used a computer to simulate(模仿)the tracks of rice that would occur in a wok moved in various ways. Along the way, the scientists hit on some key coo king tips. The wok moved in various ways. Along the way, the scientists hit on some key cooking tips. The rocking and sliding motions shouldn’t be done at the same time. 4. Also, the wok’s movements should repeat rapidly. Moving the wok even faster could launch the rice higher. That might allow cooking at higher temperatures and perhaps a quicker meal.
5. Chefs at Chinese restaurants can struggle with shoulder pain, studies have shown. Rapidly shaking their heavy woks could be part of the problem. One solution might be a stir-frying robot. It could be built based on their new found results to take the weight off chefs’ shoulders.
A.But faster shaking may be hard on a cook.
B.To make fried rice like a professional, use science.
C.If they are, the rice won’t mix well and could burn.
D.Each repetition included sliding a wok back and forth.
E.Cooking is hard work that needs patience and perseverance.
F.The high temperature helps create the tastiest stir-fried food.
G.They will turn the pan quickly, for instance, to get smooth, flat egg cakes.
高三英语七选五中等难度题查看答案及解析
Many United States companies have made the search for legal protection from import competition into a major line of work. Since 1980, the United States International Trade Commission(ITC) has received about 280 complaints alleging damage from imports that benefit from subsidies(补贴) by foreign governments. Another 340 charge that foreign companies “dumped” their products in the United States at “less than fair value”. Even when no unfair practices are claimed, the simple claim that an industry has been injured by imports is sufficient grounds to seek relief(救济).
Contrary to the general impression, this request for import relief has hurt more companies than it has helped. As corporations begin to function globally, they develop a complicated web of marketing, production, and research relationships. The complexity of these relationships makes it unlikely that a system of import relief laws will meet the strategic needs of all the units under the same parent company. Internationalization increases the danger that foreign companies will use import relief laws against the very companies the laws were designed to protect. Suppose a United States-owned company establishes an overseas plant to manufacture a product while its competitor makes the same product in the United States. If the competitor can prove injury from the imports—and that the United States company received a subsidy from a foreign government to build its plant abroad—the United States company’s products will be uncompetitive in the United States, since they would be subject to duties.
Perhaps the most shameful case occurred when the ITC investigated allegations(控诉) that Canadian companies were injuring the United States salt industry by dumping rock salt, used to deice roads. The bizarre aspect of the complaint was that a foreign conglomerate(联合企业) with United States operations was crying for help against a United States company with foreign operations. The “United States” company claiming injury was a unit of a Dutch conglomerate, while the “Canadian” companies included a unit of a Chicago firm that was the second-largest domestic producer of rock salt.
1.The passage is chiefly concerned with ________.
A. arguing against the increased internationalization of US corporations
B. recommending a uniform method for handling claims of unfair trade practices
C. warning that the application of laws affecting trade frequently has unintended consequences
D. advocating the use of trade restrictions for “dumped” products but not for other imports
2.What can be inferred about the minimal basis for a complaint to the ITC?
A. A foreign competitor is selling products in the US at less than fair market value.
B. A foreign competitor has greatly increased the volume of products shipped to the US.
C. The company requesting import relief has been banned from exporting products.
D. The company requesting import relief has been injured by the sale of imports in the US.
3.Which of the following is most likely to be true of US trade laws?
A. They will eliminate the practice of “dumping” products in the US.
B. Those applied to international companies will help to gain more profits.
C. They will affect US trade with Canada more negatively than trade with other nations.
D. Those helping one unit within a parent company won’t necessarily help other units.
高三英语阅读理解困难题查看答案及解析
too much for supper that evening, the boy could not go to sleep until deep into the night.
A. Eating B. Eaten
C. Having eaten D. To eat
高三英语单项填空简单题查看答案及解析
too much for supper that evening, the boy could not go to sleep until deep into the night.
A. Eating B. Eaten C. Having eaten D. To eat
高三英语单项填空中等难度题查看答案及解析