Humans are not the only ones that like gold. Australian scientists have discovered a new fungus ( 真菌 ) that decorates its long, thread-like tendrils ( 卷须 ) with gold collected from the soil. The experts desperately hope the “gold digger” will provide information on the locations of gold deposits ( 沉淀物 ) and make searching for the precious metal easier, and more environmentally friendly.
The gold-loving fungus was discovered accidentally by a team of researchers led by Dr. Tsing Bohu, a scientist at Australia national science agency, CSIRO, when they were examining the microbes ( 微生物 ) in the soil at Boddington, a tiny town home to Australia's largest gold mine.
A closer analysis suggested that the fungus uses chemical interactions with underground minerals to accumulate gold from its surroundings. Though fungi often interact with other things in nature, the reaction with gold was unexpected. “Fungi are well-known for playing an important role in the recycling of organic material, such as leaves and bark, as well as for the cycling of other metals,” Dr. Bohu explained. “But gold is so chemically inactive that this interaction is both unusual and surprising.”
The fungi are not wearing the gold for beauty. “There is a biological benefit from this reaction.” Dr. Bohu said, “Gold-loving fungi can grow faster and bigger relative to other fungi that don’t work with gold.”
The researchers still need to conduct further analysis to understand the relationship between the fungi and the precious metal. More importantly, they need to determine if its presence is a sure sign of the existence of large deposits of the metal underground. The scientists also believe the fungi could be used to detect the presence of gold in waste products and man-made electronics.
However, those hoping to get free gold from the fungi are in for a disappointment, for the delicate fungus is hard to see. Also, its gold can only be seen under a microscope.
1 . What are the experts starved of?
A . Investigating the sites. B . Excavating the gold mines.
C . Getting further informed. D . Unearthing gold deposits.
2 . What could be learned according to Dr. Bohu?
A . Fungi’s interaction with gold is unexpected but beneficial.
B . Gold’s classification is biologically identified by fungi.
C . Fungi’s formation with gold is fairly natural and frequent.
D . Gold is chemically accumulated by fungi’s evolution.
3 . How does the author find the finding?
A . It excites the gold diggers’ motivation.
B . It has a long way to go before confirmation.
C . It lays the foundation of geological studies.
D . It ensures the search of gold sites.
4 . What can be the suitable title for the text?
A . Beauty-loving Fungi Wrapped by Gold
B . Gold-loving Fungi Discovered in Australia
C . Boddington, Austria’s Largest Gold Mine
D . New Discovery of Gold with Fungi
1 . C
2 . A
3 . B
4 . B
【分析】
这是一篇说明文。科学家发现了 “ 喜欢 ” 金子的真菌。本文介绍了其发现经过、生物习性及相应的科学展望。
1 .
细节理解题。根据第一段中的 “The experts desperately hope the “gold digger” will provide information on the locations of gold deposits ( 沉淀物 ) and make searching for the precious metal easier, and more environmentally friendly.” 可知,专家们迫切希望 “ 淘金者 ” 能提供金矿的位置信息,使寻找这种贵金属变得更容易,更环保。由此可知,专家们希望获得更多关于携带金子的真菌的信息。故选 C 。
2 .
推理判断题。根据第三段中 “Though fungi often interact with other things in nature, the reaction with gold was unexpected.” 及 Dr. Bohu 说的话 “But gold is so chemically inactive that this interaction is both unusual and surprising.” 可知,虽然真菌经常与自然界中的其他事物相互作用,但与黄金的反应却是出乎意料的。黄金的化学反应并不活跃,两者间的相互作用既不寻常又令人惊讶。再根据第四段中的 ““There is a biological benefit from this reaction.” Dr. Bohu said, “Gold-loving fungi can grow faster and bigger relative to other fungi that don’t work with gold.”” 可知, “ 这种反应有生物学上的好处。 ” Dr. Bohu 说, “ 与其他不能与黄金共生的真菌相比,喜欢黄金的真菌可以生长得更快、更大。 ” 由此可知, Dr. Bohu 认为真菌与黄金的相互作用出人意料,但却是有益的。故选 A 。
3 .
推理判断题。根据第五段中 “The researchers still need to conduct further analysis to understand the relationship between the fungi and the precious metal. More importantly, they need to determine if its presence is a sure sign of the existence of large deposits of the metal underground.( 研究人员仍然需要进行进一步的分析,以了解真菌和贵金属之间的关系。更重要的是,他们需要确定它的存在是否是地下存在大量金属矿床的确切迹象 )” 以及最后一段 “However, those hoping to get free gold from the fungi are in for a disappointment, for the delicate fungus is hard to see.( 然而,那些希望从真菌中获得免费黄金的人注定要失望了,因为这种脆弱的真菌很难看到 )” 可推断出,作者认为此发现尚需做深入的研究。故选 B 。
4 .
主旨大意题。根据第一段的 “Humans are not the only ones that like gold. Australian scientists have discovered a new fungus ( 真菌 ) that decorates its long, thread-like tendrils ( 卷须 ) with gold collected from the soil.” 以及后文都是对该喜金真菌的描述,包括发现方式、发现分析及对其的科学展望等可知,标题核心词为 gold-loving fungi( 喜金真菌 ) 。 A 项中核心词为 beauty-loving fungi( 爱美真菌 ) ,错误; C 选项中核心词为 gold mine( 金矿 ) ,错误; D 选项中核心词为 gold with fungi( 含真菌的金子 ) ,错误。故选 B 。
【点睛】
标题猜测题目的解题步骤。一、阅读题目要求,确定文章主题;二,通读短文,了解段落内容作简要概括,留意核心词(比如本文的核心词为 gold-loving fungi );三、参看全文,对答案检验,是否存在段落与标题不符的情况。比如第 4 题选中 B 答案后,要将该标题带到每个分段落中,看是否存在不符。如果存在,就得重新考虑标题选择;不存在,即可确定答案。