California has lost half its big trees since the 1930s, according to a study to be published Tuesday and climate change seems to be a major factor(因素).
The number of trees larger than two feet across has declined by 50 percent on more than 46, 000 square miles of California forests, the new study finds. No area was spared or unaffected, from the foggy northern coast to the Sierra Nevada Mountains to the San Gabriels above Los Angeles. In the Sierra high country, the number of big trees has fallen by more than 55 percent; in parts of southern California the decline was nearly 75 percent.
Many factors contributed to the decline, said Patrick Mclntyre, an ecologist who was the lead author of the study. Woodcutters targeted big trees. Housing development pushed into the woods. Aggressive wildfire control has left California forests crowded with small trees that compete with big trees for resources(资源).
But in comparing a study of California forests done in the 1920s and 1930s with another one between 2001 and 2010, Mclntyre and his colleagues documented a widespread death of big trees that was evident even in wildlands protected from woodcutting or development.
The loss of big trees was greatest in areas where trees had suffered the greatest water shortage. The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed, taking into account such things as rainfall, air temperature, dampness of soil, and the timing of snowmelt(融雪).
Since the 1930s, Mclntyre said, the biggest factors driving up water stress in the state have been rising temperatures, which cause trees to lose more water to the air, and earlier snowmelt, which reduces the water supply available to trees during the dry season.
1.What is the second paragraph mainly about?
A.The seriousness of big-tree loss in California.
B.The increasing variety of California big trees.
C.The distribution of big trees in California forests.
D.The influence of farming on big trees in California.
2.Which of the following is well-intentioned(出于好心的) but may be bad for big trees?
A.Ecological studies of forests. B.Banning woodcutting.
C.Limiting housing development. D.Fire control measures.
3.What is a major cause of the water shortage according to Mclntyre?
A.Not enough snowmelt. B.A longer dry season.
C.A warmer climate. D.Dampness of the air.
高二英语阅读理解简单题
California has lost half its big trees since the 1930s, according to a study to be published Tuesday and climate change seems to be a major factor(因素).
The number of trees larger than two feet across has declined by 50 percent on more than 46, 000 square miles of California forests, the new study finds. No area was spared or unaffected, from the foggy northern coast to the Sierra Nevada Mountains to the San Gabriels above Los Angeles. In the Sierra high country, the number of big trees has fallen by more than 55 percent; in parts of southern California the decline was nearly 75 percent.
Many factors contributed to the decline, said Patrick Mclntyre, an ecologist who was the lead author of the study. Woodcutters targeted big trees. Housing development pushed into the woods. Aggressive wildfire control has left California forests crowded with small trees that compete with big trees for resources(资源).
But in comparing a study of California forests done in the 1920s and 1930s with another one between 2001 and 2010, Mclntyre and his colleagues documented a widespread death of big trees that was evident even in wildlands protected from woodcutting or development.
The loss of big trees was greatest in areas where trees had suffered the greatest water shortage. The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed, taking into account such things as rainfall, air temperature, dampness of soil, and the timing of snowmelt(融雪).
Since the 1930s, Mclntyre said, the biggest factors driving up water stress in the state have been rising temperatures, which cause trees to lose more water to the air, and earlier snowmelt, which reduces the water supply available to trees during the dry season.
1.What is the second paragraph mainly about?
A.The seriousness of big-tree loss in California.
B.The increasing variety of California big trees.
C.The distribution of big trees in California forests.
D.The influence of farming on big trees in California.
2.Which of the following is well-intentioned(出于好心的) but may be bad for big trees?
A.Ecological studies of forests. B.Banning woodcutting.
C.Limiting housing development. D.Fire control measures.
3.What is a major cause of the water shortage according to Mclntyre?
A.Not enough snowmelt. B.A longer dry season.
C.A warmer climate. D.Dampness of the air.
高二英语阅读理解简单题查看答案及解析
Since the forest has been destroyed by a big fire, a large ______ of trees ______ to be planted on the mountain.
A.number; has B.amount; has
C.quantity; have D.sum; have
高二英语单项填空困难题查看答案及解析
Tom wants to know if we can ____ John for the night, since he has lost all his money and can go nowhere.
A.put off B.put on C.put up D.put down
高二英语单项填空中等难度题查看答案及解析
课文填空(每空至多三个词)
California is the third largest state in the USA but has the largest population. It also has the1. of being the most multicultural state in the USA, 2. people from all over the world. The customs and languages of the immigrants live on in their new home. This diversity of culture is not 3. when you know the history of California.
People from different parts of the world, attracted by the climate and the lifestyle, still immigrate to California. It is believed that before long the mix of nationalities will be 4. great that there will be no distinct major 5. or cultural groups, but simply a mixture of many races and cultures.
Although at present human egg cells and embryos 6. for cloning research are difficult to obtain, newspapers wrote of evil leaders 7. to clone themselves to attain their ambitions. Religious leaders also raised moral questions. Governments became nervous and more conservative. Some began to reform their legal systems and 8. research into human cloning, but other countries like China and the UK, continued to accumulate evidence of the 9. medical aid that cloning could provide. However, scientists still wonder whether cloning will help or harm us and 10. it is leading us.
高二英语语法填空中等难度题查看答案及解析
1.The town has changed beyond __________(认出) since I was last here.
2.He lost his __________(胃口,食欲) because of his sorrow.
3.He entered the room without teacher’s __________(允许).
4.Please come at your __________(方便), and you will be welcome.
5.Most __________(申请人) know they have little chance of getting a visa.
6.Necessity is the mother of __________(发明).
7.My eyes slowly grew __________(适应,习惯) to the dark.
8.Envy is a __________(普遍的,全体的) weakness of people.
9.I __________(赞同) of your trying to make some money, but please don’t neglect your study.
10.The pattern of injuries is __________(一致的,吻合的) with an attack with a knife.
11.It seemed as if battle against racial __________(歧视) was being won.
12.His casual clothes were not __________(适合的,恰当的)for such a formal occasion.
13.He was a __________(代表) of Russia to the UN.
14.A rare snowstorm __________(横扫,扫过) across the region yesterday.
15.Without her timely assistance, we would never have won the __________(竞争,竞赛).
高二英语单词拼写中等难度题查看答案及解析
It is a beautiful day here and I am sitting under the big tree at the e________of the1.________
garden. I have just returned from a long bike ride to an old castle. ________seems 2.________
amazing that at my age I am still________(健康) enough to cycle 20 kilometers in 3.________
An afternoon. It’s my b________in two weeks’ time and I’ll be 82 years old! I think4.________
my long and active life must be ________ to(由于) the healthy life I live. 5.
This brings me to the real________(原因) for my letter, my dear grandson. 6.________
Your mother tells me that you started s________some time ago and now you find 7.
it difficult to give it________. Believe me, I know how easy it is to begin smoking 8.________
and how tough to s________. You see, during adolecence 9.
I a________smoked and became addicted to cigarettes. 10.
高二英语其他题中等难度题查看答案及解析
Under a big tree _______, half asleep.
A.did sit a fat man | B.a fat man sat | C.did a fat man sit | D.sat a fat man |
高二英语单项填空困难题查看答案及解析
阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。
At the edge of a forest, stood a big tree. Its branches spread out majestically (庄严地) and so did its roots. It people from the sun under its shady leaves, and provided to countless birds and other small creatures in its branches. It was very excited with activity all the time.
At the foot of the tree grew a little plant. The plant was tall, thin, graceful and easily , and tended to fall over at the of the slightest wind.
One day, the two neighbours were having a little chat.
“Well, little one, ” said the tree to the plant, “ Why do you not plant your feet deeply in the ground, and raise your head in the air as I do?”
“I see no need to do so,” the plant with a smile. “ , I think I may be safer this way.”
“Safer!” sneered (讥讽) the tree. “ Are you that you’re safer than I am? Do you know how deep my roots are , how thick and strong my trunk is? two men hold hands they would not be able to surround my trunk. Who could possibly pull me out by the roots or my head to the ground?”
And the tree turned away from the plant in .
But the tree was to its words very soon. One evening a great hurricane in the region. It threw the trees off their roots and almost completely destroyed the forest. It uprooted the tree and it away with great force.
When the storm had passed, the villagers living nearby the damage. Strong trees that had once almost touched the sky, were now reduced to stumps (残根)or . The dead animals were found everywhere in the .
But there was one . The little plant. The plant had been moved from side to side under the hurricane, and bent completely. But when the hurricane ended, it sighed and stood upright again.
No trace remained of its powerful neighbour .
1.A. hide B. protect C. prevent D. defend
2.A. shade B. food C. shelter D. space
3.A. broken B. destroyed C. grown D. planted
4.A. reach B. blow C. touch D. knock
5.A. bravely B. straightly C. gratefully D. delightedly
6.A. Explained B. shouted C. said D. whispered
7.A. Gradually B. Actually C. Generally D. Finally
8.A. concluding B. finding C. guessing D. suggesting
9.A. placed B. hidden C. buried D. planted
10.A. Even if B. As if C. Because D. When
11.A. put B. bow C. lead D. get
12.A. anger B. surprise C. belief D. relief
13.A. keep B. regret C. break D. follow
14.A. blew B. arrived C. arose D. appeared
15.A. turned B. pushed C. threw D. blew
16.A. counted B. saw C. observed D. surveyed
17.A. worse B. more C. less D. better
18.A. tree B. forest C. plant D. plain
19.A. plant B. example C. exception D. tree
20.A. then B. finally C. gradually D. Though
高二英语完形填空中等难度题查看答案及解析
The Australian postal service has apologized for delivering a letter half a century after it was sent from an island in the South Pacific.
A couple from Adelaide found the faded postcard, from the French Polynesian island of Tahiti, resting on their doorstep under a gas bill. It bore a postmark of 1966 and was addressed to one “Robert Giorgio”, according to the Adelaide Advertiser. The postcard, which was written by someone named “Chris’, reads: “I am enjoying myself greatly. The weather is very humid. I’ll try and drop you a note in England.” Its stamp cost 13 francs, or around nine pence, and is understood to have been sent to the original owner of the house, whose whereabout is unknown.
“It took a while to realize it was an old one,” said Tim Duffy, who bought the house 18 months ago with his wife, Claire, and believes it was built by an Italian man in 1963. “Then I checked the post date and it’s 1966.” He suspects the card may have been sent by someone who was travelling by boat. “It’s fresh enough although it is a bit faded and it’s got some damage to the top left, which looks like a bit of water damage,” he said. Mr Duffy handed the letter back to Australia Post, who acknowledged that something had “gone wrong” and issued an apology. “It is clear that something went wrong 50 years ago after the postcard was posted in French Polynesia, and we apologise for the inconvenience,” a spkesman said.
It is not the first time that a letter has taken vastly longer than expected arrive at its destination.
A love letter sent by a British soldier during World War Two was apparently stuck in transit for more than 64 years before it reached RAF Lakenheath in Suffolk.
1.Who wrote the postcard?
A. Claire B. Chris
C. Tim Duffy D. Robert Giorgio
2.What does the postcard look like?
A. Nice and perfect B. Old and damaged
C. Old put beautiful D. Fresh but damaged
3.The underlined word “whereabout” in Paragraph 2 is closest in meaning to “________”
A. location B. family
C. habit D. name
4.What can be inferred from the text?
A. The post card was sent out in 1963
B. Tim Duffy accepted the apology from the Australia Post
C. This is the first letter that has gone wrong during delivering
D. The person who wrote the post card would travel to England
高二英语阅读理解中等难度题查看答案及解析
Thingvellir has been a National Park in Iceland since 1930 and was named a World Heritage site by UNESCO in 2004. Aside from its historical interest, Thingvellir holds a special attraction for nature lovers.
How to get to Thingvellir National Park
1. Take Road No. 1 heading north out of Reykjavík. After driving through the town Mosfellsbær take the first exit to the right at roundabout onto Road No. 36 to Thingvellir.
2. Another choice in summertime out of Reykjavik is to take the Road No.1 towards south coast. Then turn left onto Road 431 and follow it onto Road 435 . Note that this road (435) is closed in winter and only open from May to September depending on snow conditions. Make sure to check conditions before driving it.
What to see in Thingvellir?
There is much to explore in the park including the 20-meter (66ft) Oxara waterfall, and the Nikulasargja Gorge, better known as Peningagja (Money Gorge) because it is a custom to throw coins (and sometimes credit cards!) into the icy-cold water and make a wish.The Oxararfoss Waterfall is a beautiful waterfall, though the pool under it has a darker story, for men and women were drowned there, after being sentenced to death in the Middle Ages.
Camping
There are two camp sites at Thingvellir :One by the parks service centre at Leirar and another one by Vatnskot.
Garbage does not have to be sorted before being put into the disposal cans. Ash from the barbecues should be disposed of into separate containers.
Price:
Adults (18-66 years) ISK 1300 /night + 300 ISK tax Senior (67 +) and disabled ISK 650 / night + 300 ISK tax Children/teens 0-17 years free of charge.
Parking
Thingvellir does not have entrance fee as such,but if you travel by car you will have to pay a parking fee.
The charge for a daypass on all the parking lots is as follows:
A) Passenger car, 5 seats or less - 750 ISK
B) Passenger car, 6-8 seats - 1000 ISK
C) Bus, 9-19 seats - 1800 ISK
D) Bus ,20 seats or more - 3500 ISK
For further info please contact thingvellir@thingvellir.is.
1.How much you need to pay in all if you take your family( your wife;your two kids,age 3 and 5;your parents,age 68 and 70) to camp for a night in Thingvellir National Park ?(You travel with your 7-seat car)
A.8300ISK B.6100ISK
C.5800ISK D.5100ISK
2.What is most special about the Nikulasargja Gorge?
A.People throw coins into the water and make a wish there.
B.There is a beautiful waterfall nearby.
C.The water there is icy-cold.
D.You can use your credit card there.
3.Which of the following is False according to the article?
A.Thingvellir National Park in Iceland is a World Heritage site.
B.Road 435 of Iceland is closed in winter for safety concern.
C.In the Middle Ages some people were drowned under Oxararfoss Waterfall.
D.Rubbish has to be sorted in Thingvellir National Park when camping.
高二英语阅读理解中等难度题查看答案及解析