题目内容
6.Rising levels of carbon dioxide in the atmosphere are a major cause of climate change,and now a new study has confirmed that atmospheric CO2 is also affecting the ocean chemistry and potentially harming sea life.Montana State University scientist Robert Dore has been researching the water in the Pacific Ocean for almost two decades.
"We've been going to the same spot in the Pacific Ocean,and we try and characterize long-term change in the open ocean environment.And one of the key things that we measure is CO2 levels.And we've been able to record this increasing quantity of atmospheric CO2 into the ocean."
Scientists expected that as atmospheric CO2 increased,more and more of the carbon dioxide would be absorbed into the ocean,affecting the chemical balance of the sea water,with a potentially harmful impact on shellfish and coral in particular.
"As carbon dioxide dissolves in the water,or seawater in this case,it forms a weak acid(酸),carbonic acid,"Dore explains."And therefore,as the concentration of CO2 in the atmosphere goes up and that exchanges with the surface seawater,it drives the pH down,and makes it more acidic."
The seawater Dore and his colleagues have analyzed confirms what the theory predicts.
The effect was particular striking at about 250meters down,and again at 500meters.Dore and his colleagues came up with two possible explanations.It could be that surface water picked up CO2and then moved to those depths.Or there could be a biological explanation.
"It's important to realize that the oceans are really becoming acidic.And it can have negative impacts on a whole variety of sea life from fish to coral.It's potentially catastrophic."
72.What can be the best title of the passage?A
A.Sea Life Facing Danger B.Climate Change Affecting Seawater
C.Oceans Becoming More Acidic D.Scientist Researching Seawater
73.Which of the following shows the process of the impact of atmospheric CO2 on sea life?B
a.Sea life is endangered.
b.CO2 goes into the surface water.
c.The ocean chemistry is affected.
d.CO2 decreases the PH and makes the seawater more acidic.
e.CO2 levels in the atmosphere go up.
A.a→b→c→d→e B.e→b→c→d→a C.a→e→c→d→b D.e→d→c→b→a
74.Scientist Robert Dore came to the conclusion based onA.
A.his research and analysis
B.the expectation of other scientists
C.some former theory
D.a major cause of climate change
75.What does the passage want to tell us most?C
A.It takes time to make a scientific study.
B.Atmospheric CO2 is doing harm to sea life.
C.Measures should be taken to prevent the potential catastrophe.
D.Robert Dore is a committed and serious scientist.
分析 这篇文章主要讲了二氧化碳的排放引起海水化学物质的改变从而是海洋动物受到危险.
解答 72.A 主旨大意题:从第一段的句子:Rising levels of carbon dioxide in the atmosphere are a major cause of climate change,atmospheric CO2 is also affecting the ocean chemistry and potentially harming sea life.可知文章主要讲的是海洋生物正在遭遇危险.选A
73.B 排序题.从第五段可知这个过程.选B
74.A 细节题理解.从第二段和第六段可知科学家 Robert Dore 是根据自己的研究和分析得出结论的.所以答案是A
75.C 推理判断题.文章最后一段主要是告诉我们现在海洋的状态,对整个海洋生物有着不好的影响,存在可能的危险.所以可以推断文章想要告诉我们,必须采取措施,防止灾难发生.故选择C.
点评 本篇阅读理解题型多样,细节题,主旨题,还有很新颖的排序题型,学生既要求把握主旨,也要留意细节.
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B.Grenada and Grimsey
C.Newfoudnland and Cuenca
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A.uropygialis birds
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C.puffin birds.
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A.the hanging rocky face of an art museum
B.a naturally formed castle
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A.There are no people living in Grimsay due to the extreme whether.
B.Grenada would especially appeal to the cooking fans.
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A.Tucson and Newfoundland
B.Grenada and Grimsey
C.Newfoudnland and Cuenca
D.Tucson and Cuenca
71.The creature(s) mentioned in the booklet that is not afraid of cold weather isC.
A.uropygialis birds
B.whales and seabirds
C.puffin birds.
D.hunting dog
72.Cuenca's major tourist attraction isA.
A.the hanging rocky face of an art museum
B.a naturally formed castle
C.the famous bakery in the summer time
D.a wooden pedestrian swinging bridge
73.Which of the following statements is TRUE according to the booklets?
A.There are no people living in Grimsay due to the extreme whether.
B.Grenada would especially appeal to the cooking fans.
C.The most impressive focus of attraction in Southern Belize is the Blue Hole.
D.People's safety in Tucson can't be guaranteed by the local government.