"Tiny tubes and filaments （丝状物） in some Canadian rock appear to be the oldest known fossils， giving new support for some ideas about how life began，" a new study says．
"The features are mineralized remains of what appear to be bacteria that lived some 3.77billion to 4.28billion years ago，" the scientist said． That would be older than some other rock features found in Greenland， which were considered to be the fossils last August．
The new results come from examining rock found along the eastern shore of Hudson Bay in Northern Quebec． The filaments and tubes， made up of iron oxide called hematite （赤铁矿），appeared within a rock type called jasper （碧玉）．
Matthew Dodd of University College London， an author of the study published Wednesday by Nature， said the living things lived in the seafloor where water was heated by a volcano． "Since the fossils are nearly as old as Earth， which formed some 4.5 billion years ago， the findings support previous indications that life may have begun in such an environment，" he said．
He and his colleagues presented several lines of evidence to support the idea that tiny tubes and filaments are signatures of past life． But two experts who've previously reported similar findings said they are not convinced．
"I would say they are not fossils，" Martin J． Van Kranendonk of the University of New South Wales in Australia， who reported the Greenland findings last year， wrote in an email． "The paper's evidence for a biological origin falls short，" he said．
Abigail Allwood， a NASA geologist， said the authors have produced one of the most detailed cases yet made for evidence of life in rocks older than 3.5 billion years． But "It's an extraordinary claim to make and you do need extraordinary evidence，" she said．
1.What do Matthew， Martin and Abigail have in common？ ______
A. They have been studying rock features．
B. They are working in the same university．
C. They all made a contribution to the Greenland findings．
D. They have discovered the oldest known fossils in the same place．
2.How does Martin feel about the new study？ ______
A. It confirms the biological origin．
B. It ignores the Greenland findings．
C. It needs more to convince people．
D. Its authors take ideas and words from his．
3.What's Abigail Allwood's attitude toward Matthew's findings？ ______
A. Supporting． B. Disapproving．
C. Indifferent． D. Neutral．
4.The new findings can make people know something about ______ ．
A. the process of fossil formation
B. how life started on the earth
C. how to examine rock and find fossils
D. how the earth formed about 4.5 billion years ago
高三英语阅读理解中等难度题
"Tiny tubes and filaments （丝状物） in some Canadian rock appear to be the oldest known fossils， giving new support for some ideas about how life began，" a new study says．
"The features are mineralized remains of what appear to be bacteria that lived some 3.77billion to 4.28billion years ago，" the scientist said． That would be older than some other rock features found in Greenland， which were considered to be the fossils last August．
The new results come from examining rock found along the eastern shore of Hudson Bay in Northern Quebec． The filaments and tubes， made up of iron oxide called hematite （赤铁矿），appeared within a rock type called jasper （碧玉）．
Matthew Dodd of University College London， an author of the study published Wednesday by Nature， said the living things lived in the seafloor where water was heated by a volcano． "Since the fossils are nearly as old as Earth， which formed some 4.5 billion years ago， the findings support previous indications that life may have begun in such an environment，" he said．
He and his colleagues presented several lines of evidence to support the idea that tiny tubes and filaments are signatures of past life． But two experts who've previously reported similar findings said they are not convinced．
"I would say they are not fossils，" Martin J． Van Kranendonk of the University of New South Wales in Australia， who reported the Greenland findings last year， wrote in an email． "The paper's evidence for a biological origin falls short，" he said．
Abigail Allwood， a NASA geologist， said the authors have produced one of the most detailed cases yet made for evidence of life in rocks older than 3.5 billion years． But "It's an extraordinary claim to make and you do need extraordinary evidence，" she said．
1.What do Matthew， Martin and Abigail have in common？ ______
A. They have been studying rock features．
B. They are working in the same university．
C. They all made a contribution to the Greenland findings．
D. They have discovered the oldest known fossils in the same place．
2.How does Martin feel about the new study？ ______
A. It confirms the biological origin．
B. It ignores the Greenland findings．
C. It needs more to convince people．
D. Its authors take ideas and words from his．
3.What's Abigail Allwood's attitude toward Matthew's findings？ ______
A. Supporting． B. Disapproving．
C. Indifferent． D. Neutral．
4.The new findings can make people know something about ______ ．
A. the process of fossil formation
B. how life started on the earth
C. how to examine rock and find fossils
D. how the earth formed about 4.5 billion years ago
高三英语阅读理解中等难度题查看答案及解析
Some people care much about their appearance and always ask if they look fine in ______ they are wearing.
A. that B. what C. how D. which
高三英语单项填空中等难度题查看答案及解析
Some people care much about their appearance and always ask if they look fine in ________ they are
wearing.
A．that B．what C．how D．which
高三英语单项填空困难题查看答案及解析
Molai grew up in a tiny village in India. The village lay near some wetlands which became his second___________. He learned the value and beauty of _________ there from a very young age.
When he was 16, Molai began to notice something _________ happening around his home. A flood had hit the area earlier that year and the _________ it caused had driven away a number of birds. _________, the number of snakes had declined as well. He _________ that it was because there weren’t enough trees to protect them from the _________. The solution, of course, was to plant trees so the animals could seek _________ during the daytime. He turned to the _________ department for help but was told that nothing would grow there. However, Molai went looking on his own and __________a nearby island where he began to plant trees.
________ young plants in the dry season was ____________for a lone boy. Molai built at the __________ of each sapling(幼树)a bamboo platform, where he placed earthen pots with small holes to____________ rainwater. The water would then drip(滴落)on the plants below.
Molai __________ to plant trees for the next 37 years. His efforts have resulted in 1,360 acres of naturally-grown land that has become home to many plants and animals.
1.A.dream B.job C.home D.choice
2.A.nature B.youth C.culture D.knowledge
3.A.precious B.interesting C.disturbing D.awkward
4.A.waste B.tension C.pain D.damage
5.A.Besides B.However C.Therefore D.Otherwise
6.A.agreed B.realized C.remembered D.predicted
7.A.noise B.heat C.disease D.dust
8.A.directions B.partners C.help D.shelter
9.A.labor B.police C.forest D.finance
10.A.rebuilt B.discovered C.left D.managed
11.A.Decorating B.Observing C.Watering D.Guarding
12.A.tough B.illegal C.fantastic D.beneficial
13.A.back B.top C.foot D.side
14.A.cool down B.keep off C.purify D.collect
15.A.returned B.learned C.failed D.continued
高三英语完形填空中等难度题查看答案及解析
Some people skip meals or eat only tiny amounts of food and may have conditions ______ rob the body of the nutrients ______ needs to grow and stay healthy.
| A．which…it | B．that…that |
| C．where…that | D．where…it |
高三英语单项填空简单题查看答案及解析
Some equipment as well as a number of maps and books to Zhouqu since the mud-rock flow occurred.
| A．has been offered | B．have been offered |
| C． are offered | D．is being offered |
高三英语单项填空简单题查看答案及解析
Tensions have erupted over some barren rocks in the Pacific that you may never have heard of, but stay tuned—this is a boundary dispute(争端) that could get ugly and some day have far-reaching consequences for China, Japan, Taiwan and the United States.
The islands in dispute are called the Senkaku chain by Japan, the Diaoyu islands by China, and the Diaoyutai by Taiwan. All three claim the islands, which are really just five small islands and three barren rocks northeast of Taiwan, 200 miles off the Chinese coast.
The latest conflict occurred when a Chinese fishing boat collided(碰撞) with two Japanese naval ships trying to stop it near the islands. The Japanese prevented the Chinese captain from leaving the place for questioning and the two countries have been exchanging angry protests.
The reason to worry is that nationalists in both China and Taiwan see the islands as unquestionably theirs and think that their government has been weak in claiming this authority.
So far, wiser heads have generally won the argument on each side, but at some point a weakened Chinese leader might try to gain the legal right with the public by pushing the issue and recovering the islands. It would be a dangerous game and would have a disastrous impact on China-Japan relations, but if successful it would raise the popularity of the Chinese government.
In reality, of course, there is zero chance that the U.S. will honor its treaty(条约) with Japan over a few barren rocks. We're not going to risk a nuclear conflict with China over some islands that may well be China's. But if we don't help, our security relationship with Japan will be at the breaking point.
So which country has a better claim to the islands? My feeling is that it's China, although the answer isn't clear-cut. Chinese navigational records show the islands as Chinese for many centuries, and a 1783 Japanese map shows them as Chinese as well. Japan purported to “discover” the islands only in 1884 and took control of them by force only in 1895 when it also grabbed Taiwan.
The best approach would be for China and Japan to agree to refer the dispute to the International Court of Justice, but realistically that won't happen. And since some believe that the area is rich with oil and gas reserves, the claims from each side have become more insistent.
As Chinese nationalism grows, as China's navy and ability to project power in the ocean gains, we could see some military conflicts over the islands.
Taken from NewYork Times
1.The underlined word “purported” (in Para.7) is closest in meaning to “_____”.
A. happened B. claimed C. pretended D. intended
2.The latest conflict referred to in the passage occurred because _____.
A. the Japanese government has bought the Diaoyu Islands from the Liyuans
B. two Japanese naval ships sailed in the Chinese sea around the Diaoyu Islands
C. the Japanese kept the captain of a fishing boat from returning for questioning
D. a fishing boat collided with two Japanese naval ships by design in the Japanese sea
3.Which of the following is the author's personal idea?
A. It is the two Japanese naval ships that are to blame for the conflict.
B. It is the Chinese captain of a fishing boat that is to blame for the conflict.
C. It is the U.S. that will honor its treaty with Japan over a few barren rocks.
D. It is China that has a better claim to the islands because of its navigational records.
4.What can be inferred according to the passage?
A. The claim from both sides has become more insistent.
B. Japan has navy and ability to power the Diaoyu Islands.
C. China is developing so quickly that it will declare a war on Japan.
D. The dispute between China and Japan has put the U.S. in a dilemma.
高三英语阅读理解简单题查看答案及解析
Listening to loud music at rock concerts ________ caused hearing loss in some teenagers.
A. is B. are C. has D. have
高三英语单项填空中等难度题查看答案及解析
Listening to loud music at rock concerts ________ caused hearing loss in some teenagers.
A. is B. are C. has D. have
高三英语单项填空中等难度题查看答案及解析
Listening to loud music at rock concerts ________ caused hearing loss in some teenagers.
A. is B. are C. has D. have
高三英语单项填空中等难度题查看答案及解析