If we planted a lot more trees in just the ri...

If we planted a lot more trees in just the right places, they could reduce the amount of carbon in the atmosphere to levels not seen since the 1920s, said study leader Jean Francois Bastin, an ecologist from the Swiss Federal Institute of Technology. After examining more than 70,000 high-quality satellite photos of trees from all over the planet, ecologists concluded that the earth could support 900 million additional hectares (公顷) of tree cover.

Bastin and his colleagues developed a computer program that estimates how much forested land could be restored both now and in a future warmer world. The team members combed through 78,774 satellite photos of a variety of ecosystems- everywhere from the thick Amazon rainforest to the dry Sahel in Africa-that had been protected from human influence. They counted every tree in every photo to assess the current tree coverage in natural environments. The researchers combined that information with data about the climate, temperature and soil conditions for each ecosystem. Then they taught their program to put it all together to determine how much tree coverage a particular area could support.

The result shows trees currently cover 2.8 billion hectares of land- but they have the potential to populate as much as 4.4 billion hectares. Right now, much of the additional 1.6 billion hectares is being used for agriculture or urban spaces. The researchers took those areas off the table and saw that the earth still has 900 million hectares ready and waiting to be restored with trees an area roughly the size of Brazil. When those trees mature, they could remove 205 gigatonnes (兆吨) of carbon from the atmosphere, the study calculated, That represents about two-thirds of the roughly 300 gigatonnes of atmospheric carbon that can be traced to human actions, they said.

Even if trees are planted in the most mindful way, other actions are still needed to fight climate change, Bastin said.

1.Why did Bastin develop a computer program?

A.To reduce air pollution in Africa.

B.To determine carbon dioxide in the air.

C.To assess the potential forested land.

D.To calculate the area of forest in the world.

2.What does the underlined phrase “combed through” in Paragraph 2 refer to?

A.Looked into. B.Put away.

C.Brought back. D.Took in.

3.What can we infer from what Basin said in the last paragraph?

A.Brazil has large areas to plant trees.

B.The tree cover is not enough to control greenhouse gases.

C.Trees removed two-thirds of carbon in the atmosphere.

D.Other actions are equally important compared to planting trees.

4.What is the author’s attitude towards the research result?

A.Disapproving. B.Doubtful.

C.Supportive. D.Objective.

高三英语阅读理解困难题查看答案及解析

The children planted more trees and flowers after they______Greener China.

高三英语单项填空简单题查看答案及解析

We have planted many trees in order to ______wind and sand in the desert.

A. hold down　　 B. hold up

C. hold back　　 D. hold out

高三英语单项填空中等难度题查看答案及解析

In the botanic garden we can find a（n）______of plants that range from tall trees to small flowers.

高三英语单项填空简单题查看答案及解析

There has to be more original Asian thinking _____ Asia wants to take its rightful place in the world.

A. providing                     B. supposed                  C. considering               D. given

高三英语单项填空简单题查看答案及解析

—Bill,if it doesn’t rain,we can go straight on and spend more time in Vienna.

—______ I just want to hear Mozart.

A.Well done!                                B.No problem.

C.That’s great!                                D.That’s it.

高三英语单项填空中等难度题查看答案及解析

It never will rain roses. __________ we want to have more roses. we must plant trees.

A. When　　　　　　　 B. Unless　　　　　　　 C. Until　　　　　　　　 D. While

高三英语单项填空简单题查看答案及解析

—Bill,if it doesn’t rain,we can go straight on and spend more time in Vienna.

—______I just want to hear Mozart.

高三英语单项填空中等难度题查看答案及解析

If we could all learn to ________ a little more, the world would be a much happier place.

A.live and let live B.live from hand to mouth

C.fight fire with fire D.add fuel to the flames

高三英语单项填空中等难度题查看答案及解析

Sometimes just when we need the power of miracles, they arise in the places we would least expect.

On a cold January afternoon in 1989, I was climbing Egypt’s Mt. Horeb, hoping to get to the peak by sunset to see the valley below. As I was winding up the narrow path, I’d sometimes see other hikers who were coming down. While they would generally pass with simply a nod or a greeting in another language, there was one man who did neither.

I saw him coming and as he got closer, I could see that, unlike other hikers, he was wearing traditional Egyptian galabia( 长 袍 ). What made his appearance so strange was that the man didn’t even appear to be Egyptian, but was a small-framed Asian man with little hair and round glasses.

As we neared one another, I said Hello, but not a sound came from him. I thought maybe he hadn’t heard me. Suddenly he stopped directly in front of me, looked up from the ground, and spoke a single sentence to me in English, “Sometimes you don’t know what you have lost until you’ve lost it.” As I took in what I had just heard, he simply stepped around me and continued his going down.

That moment in my life was a small miracle. The reason is less about what the man said but more about the timing and the context. The year was 1989, and it was during my Egyptian pilgrimage (朝圣), and specifically during my hike to Mt. Horeb, that I’d set the time aside to make decisions that would affect my career, my friends, my family, and ultimately, my life.

I had to ask myself what the chances were of an Asian man dressed in an Egyptian galabia coming down from the top of this historic mountain just when I was walking up, stopping before me, and offering his wisdom, seemingly from out of nowhere. My answer to my own question was easy: nearly no chance! In a meet that lasted less than two minutes, a total stranger had brought something clear and something of a warning, regarding the huge changes that I would make within a matter of days. In my way of thinking, that’s a miracle.

Miracles are everywhere and occur every day for different reasons, in response to the different needs that we may have in the moment. Our job may be less about questioning the extraordinary things that happen in our daily lives and more about accepting the gifts they bring.

1.Before the Asian man spoke, how did the author think about him?

A.He was very rude and strange.

B.He was different from others.

C.He was shy and nod to strangers.

D.He looked ordinary and was talkative.

2.Why did the author make a pilgrimage to Mt Horeb in Egypt ?

A.He was in search of a miracle in his life.

B.It was a place for a religious person to head for.

C.He intended to make arrangements for his future life.

D.He waited patiently in expectation of meeting a wise person.

3.What does the underlined part “my own question” refer to in paragraph 6 ?

A.For what reason did the man stop before me ?

B.Why did the Asian man go to the mountain ?

C.What change would I make within a matter of days ?

D.What was the probability that others told us the right words ?

4.Why did the author view the meet with the Asian man as a miracle in his life?

A.Because the Asian man’s appearance had a deciding effect on his future life.

B.Because his words were in perfect response to the need he had at that moment.

C.Because what the Asian man said was meaningful in the philosophy of life.

D.Because the Asian man impressed on him the worth of what he had possessed.

5.What might be the best title for the passage ?

A.Can you recognize a miracle? B.Is a miracle significant to us?

C.When might a miracle occur? D.Why do we need a miracle?

高三英语阅读理解中等难度题查看答案及解析