Question

【題目】 Tiny microbes (微生物) are at the heart of a new agricultural technique to manage harmful greenhouse gas. Scientists have discovered how microbes can be used to turn carbon dioxide into soil-enriching limestone (石灰石), with the help of a type of tree that grows in tropical areas, such as West Africa.

Researchers have found that when the Iroko tree is grown in dry, acidic soil and treated with a combination of natural fungi (霉菌) and other bacteria, not only does the tree grow well, it also produces the mineral limestone in the soil around its root.

The Iroko tree makes a mineral by combining Ca from the earth with CO2 from the atmosphere. The bacteria then create the conditions under which this mineral turns into limestone. The discovery offers a new way to lock carbon into the soil, keeping it out of the atmosphere. In addition to storing carbon in the trees' leaves and in the form of limestone, the mineral in the soil makes it more suitable for agriculture.

The discovery could lead to reforestation projects in tropical countries, and help reduce carbon dioxide in the atmosphere in the developing world. It has already been used in West Africa and is being tested in Bolivia, Haiti and India.

The findings were made in a three-year project involving researchers from the Universities of Edinburgh, Granada, Lausanne and Delft University of Technology. The project examined several microbiological methods of locking CO2 as limestone, and the Iroko-bacteria way showed best results. Work was funded by the European Commission under the Future&Emerging Technologies(FET)scheme.

Dr Bryne Ngwenya of the University of Edinburgh's School of GeoSciences, who led the research, said："By taking advantage of this natural limestone-producing process, we have a low-tech, safe, readily employed and easily operating way to lock carbon out of the atmosphere, while improving farming conditions in tropical countries."

【1】The passage is mainly introducing ______ .

A.some useful natural fungi and bacteria

B.the soil-enriching limestone created by scientists

C.a newly-found tree in West Africa

D.a new way to deal with greenhouse gas

【2】Which of the following is True about tiny microbes?

A.Tiny microbes get along well with the Iroko tree in special soil.

B.CO2 can be broken down by natural fungi and bacteria.

C.The more greenhouse gas is, the more active tiny microbes become.

D.Most tiny microbes like living in dry, acidic soil.

【3】What does the underlined word "it" in paragraph 3 probably refer to?

A.Carbon dioxide.B.Soil.

C.Carbon.D.Limestone.

【4】According to the passage, what can we infer?

A.The action of the tiny microbes can increase the oxygen in the earth.

B.Researchers tend to use natural power to solve their problem.

C.Researchers have done the experiment on trees in Africa for three years.

D.West Africa is one of the most polluted areas all over the world.

Answer 1

【答案】

【1】D

【2】A

【3】B

【4】B

【解析】

這是一篇說(shuō)明文。這篇文章主要向我們描述了處理溫室氣體的新方法，即利用微生物。

【1】主旨大意題。根據(jù)文章的主要內(nèi)容，尤其是第一段 的Tiny microbes(微生物) are at the heart of a new agricultural technique to manage harmful greenhouse gas(微生物正處于一種新的農(nóng)業(yè)技術(shù)的核心，以處理有害的溫室氣體)可知，文章主要介紹處理溫室氣體的新方法，即利用微生物。D. a new way to deal with greenhouse gas(一種處理溫室氣體的新方法)符合以上說(shuō)法，故選D項(xiàng)。

【2】細(xì)節(jié)理解題。根據(jù)文章第二段的 Researchers have found that when the Iroko tree is grown in dry, acidic soil and treated with a combination of natural fungi(霉菌) and other bacteria, not only does the tree grow well, it also produces the mineral limestone in the soil around its root(研究人員發(fā)現(xiàn)，當(dāng)伊洛科樹(shù)生長(zhǎng)在干燥的酸性土壤中，并與天然真菌和其他細(xì)菌結(jié)合后，它不僅生長(zhǎng)良好，還會(huì)在根部周?chē)�的土壤中產(chǎn)生礦物石灰?guī)r)可知，微小的微生物對(duì)在特殊土壤中的易洛子樹(shù)起著很好的作用。A. Tiny microbes get along well with the Iroko tree in special soil.( 微生物與在特殊土壤中的易洛子樹(shù)相處融洽)符合以上說(shuō)法，故選A項(xiàng)。

【3】詞義猜測(cè)題。根據(jù)第三段的In addition to storing carbon in the trees' leaves and in the form of limestone, the mineral in the soil makes it more suitable for agriculture 可知，除了將碳儲(chǔ)存在樹(shù)木的葉子和石灰?guī)r的形式之外，土壤中的礦物質(zhì)使它更適合農(nóng)業(yè)。結(jié)合句意可推測(cè)劃線詞指的是“土壤”。B. Soil.(土壤)符合以上說(shuō)法，故選B項(xiàng)。

【4】推理判斷題。根據(jù)文章最后一段的By taking advantage of this natural limestone-producing process, we have a low-tech, safe, readily employed and easily operating way to lock carbon out of the atmosphere, while improving farming conditions in tropical countries (通過(guò)利用這種天然石灰石生產(chǎn)工藝，我們擁有了一種低技術(shù)含量、安全、易于使用和易于操作的方法，來(lái)鎖定大氣中的碳，同時(shí)改善熱帶國(guó)家的農(nóng)業(yè)條件)可推斷，研究人員傾向于利用自然力量來(lái)解決他們的問(wèn)題。B. Researchers tend to use natural power to solve their problem(研究者傾向用自然的力量去解決他們的問(wèn)題)符合以上推測(cè)，故選B項(xiàng)。