Question

【題目】Humans aren’t the only ones getting a buzz from coffee．Caffeine can improve memory among honeybees and lead to better pollination(授粉)．According to a recent study published in the journal Science．

The study was conducted by a team of researchers at Newcastle University in the United Kingdom．They found that the nectar(花蜜)of some flowers，such as those from grapefruit and lemon plants，as well as certain coffee flowers，contains low doses of caffeine．To get bees to feed on these flowers，the team trained the insects to associate food with the smell of the flowers．They also trained another group of bees to feed on nectar from flowers that were sweetened with a sugar, but did not contain caffeine．After 24 hours，the bees trained on caffeinated flowers returned to these plants three times as often as those trained on the sweetened flowers returned to the uncaffeinated plants．

Professor Geraldine Wright led the researchers．“Remembering floral traits(花部特征)is difficult for bees to perform at a fast pace as they fly from flower to flower and we found that caffeine helps the bee remember where the flowers are，”Wright said in a statement．

Improved memory led to the better pollination．That’s because once bees sip the caffeine nectar, they continue to look for more coffee plants to pollinate．This also suggests that caffeine plays a role in improving the bees’ability to search for food．

Researchers found that caffeine’s effect on the bee brain is similar to its effect on mammals．“The change is similar to that produced by caffeine in neurons(神經(jīng)元)associated with learning and memory in the rat brain，”Wright said．

span>Bee populations have declining since 2007．The dramatic drop in the insects’numbers has serious effects for ecosystems and the farming industry．Bees are needed in the reproduction of crops and spreading wild flower species．Understanding what keeps bees buzzing could help to make sure that the insects are able to remember and pollinate their favorite flowers．

【1】Which of the following is mentioned in the passage?

A．Caffeine has no effect on the rat brain．

B. Bee population has been increasing．

C．The nectar of lemon plants contains caffeine．

D．Bees dislike nectar from sweetened flowers．

【2】After reading the passage，John，who works in the farming industry, will probably feel________.

A．a(chǎn)nnoyed B．a(chǎn)ngry C．nervous D．excited

【3】Which of the following relationship is correct according to the passage?

A．improved memory—caffeine nectar—better pollination

B．caffeine nectar—improved memory—better pollination

C．improved memory—better pollination—caffeine nectar

D．caffeine nectar—better pollination—improved memory

【4】What section of a newspaper may this passage be taken from?

A．Science B．Education

C．Culture D．Sports

Answer 1

【答案】

【1】C

【2】D

【3】B

【4】A

【解析】

試題分析:一項研究顯示咖啡因可以提高蜜蜂的技記憶能力，進而產(chǎn)生更好的授粉效果。這一研究結(jié)果對于農(nóng)業(yè)的發(fā)展也能起到很大的幫助。

【1】細節(jié)理解題。排除法。選項A，從文中第五段The change is similar to that produced by caffeine in neurons(神經(jīng)元)associated with learning and memory in the rat brain，這種變化是類似于由咖啡因在神經(jīng)元中產(chǎn)生的與老鼠腦中的學習和記憶相關的。故可知咖啡因?qū)�老鼠大腦有影響。故A錯誤；選項B，從文中第六段Bee populations have declining since 2007．蜜蜂數(shù)量自2007年以來一直減少。故B錯誤；選項D，從文中第二段the bees trained on caffeinated flowers returned to these plants three times as often as those trained on the sweetened flowers returned to the uncaffeinated plants．用咖啡因花培養(yǎng)過的蜜蜂返回到這些植物的次數(shù)是用甜的花朵培養(yǎng)的蜜蜂返回到非咖啡因植物的三倍。故可知未提到說蜜蜂不喜歡甜花的花粉。故D錯誤。而選項C，從文中第二段such as those from grapefruit and lemon plants，as well as certain coffee flowers，contains low doses of caffeine．如從葡萄柚和檸檬的植物，以及某些咖啡花，含有低劑量的咖啡因。故C正確。故選C。

【2】細節(jié)分析題。從本文最后一段，The dramatic drop in the insects’numbers has serious effects for ecosystems and the farming industry．昆蟲數(shù)量的急劇下滑對生態(tài)系統(tǒng)和農(nóng)業(yè)造成了嚴峻的影響，以及Understanding what keeps bees buzzing could help to make sure that the insects are able to remember and pollinate their favorite flowers．了解是什么讓蜜蜂嗡嗡可以幫助確保這種昆蟲能夠記得并對他們最喜歡的花授粉。故選D。

【3】細節(jié)分析題。從第三段we found that caffeine helps the bee remember where the flowers are我們發(fā)現(xiàn)咖啡因可以幫助蜜蜂記得花在哪里，和第四段Improved memory led to the better pollination．提高的記憶能導致更好的授粉。故可知caffeine nectar與improved memory與better pollination的關系，故選B。

【4】細節(jié)理解題。從文中第一段According to a recent study published in the journal Science．根據(jù)最近一項發(fā)表在科學雜志上的研究。故可知這篇研究是在報紙的科學部分。

可知選A。