2. Scientists have (取得突破) in their treatment of that disease.
科目：高中英語 來源： 題型：
Nowadays,there is a heated debate on whether pollutants should be cleaned in the air. Cleaning up the air,while good for our lungs,could make global warming worse. And the pollutants still go up around the air,along with carbon dioxide.
These pollutants are called aerosols and they include soot as well as mixtures of nitrogen (氮) and sulfur (硫) and other stuff into the air. Natalie Mahowald,a climate researcher at Cornell University,says,so far,scientists have mostly tried to understand what those aerosols do while they’re actually in the air.
“There are so many different kinds of aerosols,” she says. “Some are warm and some are cool. But in fact,humans are giving out a lot of extra aerosols,and they tend to cool for the most part. ”
The aerosols reflect sunlight back into space,or keep us cool. But it turns out that’s not all they do. These aerosols also influence how much carbon dioxide gets drawn out of the air by plants on land and in the sea.
“They can add nutrients,for example,to the ocean or to the land ,” Mahowald says. “But also while they’re in the atmosphere they can change the climate,and thus that also can influence the amount of carbon,the land or the ocean can take up. So there are quite a few different ways that aerosols can act on each other. ”
Mahowald’s results suggest that reducing those pollutants could be an even bigger problem than realized,when you consider that aerosols help remove carbon dioxide from the air by encouraging plant growth. Hard numbers on this effect are highly uncertain at the moment,but this could turn out to be quite significant.
And studying it is not easy because the effects aren’t well understood. For example,nitrogen can be a fertilizer (肥料) , but it can stop plant growing when nitrogen comes out of the air in acid form.
Right now it seems like we’re much more likely to clean up aerosol pollution,while increasing the amount of carbon dioxide in the air. So scientists,unfortunately,may have a chance to see whether this experiment on our planet should continue or not.
( ) 5. From Paragraph 2,we know that .
A. scientists have been aware of how aerosols work
B. Natalie Mahowald is an expert in climate
C. cleaning up the air is so popular
D. pollutants are under control so far
( ) 6. What does the last sentence of the passage imply?
A. Scientists will be in a dilemma.
B. The experiment will be successful.
C. Scientists will carry out the experiment.
D. Scientists have difficulty in the experiment.
( ) 7. Which of the following can be the best title of this passage?
A. Pollutants in the Air
B. The Experiment on the Planet
C. The Reason for Global Warming
D. The Influence of Aerosols
查看答案和解析>>
科目：高中英語 來源： 題型：
假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文。文中共有10處語言錯誤，每句中最多有兩處。每處錯誤僅涉及一個單詞的增加、刪除或修改。
增加：在缺詞處加一個漏字符號(A ) ，并在其下面寫出該加的詞。
刪除：把多余的詞用斜線(\) 劃掉。
修改：在錯的詞下畫一橫線，并在該詞下面寫出修改后的詞。
注意：1. 每處錯誤及其修改均僅限一詞；
2. 只允許修改10處，多者(從第11處起) 不計分。
Recently,our school has held the meaningful discussion on whether it is reasonable for middle school students to have classes on weekends. Some of our classmates believe we should have classes on weekends because we can make fully use of free time to review the lessons we had learnt. Some others are against the opinion,saying we had better to have a good rest on weekends so that we can work effective during the weekdays. The rest agree with neither of the opinion. They have the view which keeping the balance between work and play are important for us. They suggest one day of the weekend should used to learn our lessons and during the other day we do something interested or have a rest.
查看答案和解析>>
科目：高中英語 來源： 題型：
01. 書面表達
假設你是紅星中學高二(1) 班的學生李華，下面四幅圖描述了你們家上周收留流浪狗的真實故事，請根據圖片的先后順序，為校刊“英語園地”寫一篇短文。
注意：1. 文章的開頭已為你寫好；
2. 詞數100左右。
Last Friday,
The following are a few tips that I follow to create happiness in my life.
查看答案和解析>>
科目：高中英語 來源： 題型：
3. They took the injured straight to the hospital. Otherwise some of them might die.
查看答案和解析>>
科目：高中英語 來源： 題型：
8. He was unable to hold a regular job but could (load) trucks and was proud that he'd managed to buy his own television set.
查看答案和解析>>
湖北省互聯網違法和不良信息舉報平臺 | 網上有害信息舉報專區 | 電信詐騙舉報專區 | 涉歷史虛無主義有害信息舉報專區 | 涉企侵權舉報專區
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com
