新高中英语人教版选修9Unit4PeriodⅣUsingLanguage学业分层测评8【含解析】

学业分层测评 ( 八)
(建议用时： 30 分钟 )
Ⅰ.单词拼写
1．Why did humans________进(化) to walk upright?
2．I________(附带)a copy of my notes for your information.
3．Since I'm here，I'd like to try a________(有代表性的) dish of this country. 4．The dying fire was throwing out a________(灰暗的) red light.
5．Don't grasp at the________脆(弱的) branch，or you may break it. 6．The window frames have ________腐(烂)away completely.
7．There are some ________甲(虫)on the plants.
8．The flower has seven ________花(瓣)．
9．The air was ________芬(芳的)with scents from the sea and the hills.
10．The meat gives out an unpleasant
【答案】 1.evolve 2.attach 3.typical 气(味 )．
4.dull
5.delicate
6.rotted
7.beetles8.petals9． fragrant10.odour
Ⅱ.阅读理解
A
Have you ever wondered why stems(茎 )grow upwards and roots downwards? Why plants always seem to turn towards the light and climbing plants run up rather than down? The answer is simple: auxin(生长素 )， a chemical substance that controls growth in plants.
Auxin gives away its secrets
Auxin is a plant hormone(激素 )．Darwin was already interested in it in the 19th century.Only in recent years，however，has the hormone started to give away its secrets，thanks to intensive molecular research.Auxin is produced in the young，growing parts of plants and then transported throughout the plant—to a low- lying stem for example.The stem needs to straighten out as soon as possible to be able to absorb the topside ， resulting in the underside growing faster and the stem
straightening out.For the same reason，plants in front of windows will always turn to the light.This active regulation of auxin transport allows plants to take ideal advantage of local and changing conditions.
A new means of transport for auxin
The transport of auxin through the plant plays a vital role.And ， from all appearances，it is not a simple matter.The researchers identified an important new link and means of transport for auxin: PILS proteins (蛋白质 )．PILS proteins are vital for auxin-dependent plant growth and adjust the intracellular(细胞内的 )storage of the hormone.It is exactly this compartmentalizing (分类 ) of auxin that seems functionally important for the various developmental processes.
Growing crops more efficiently: the right amount of auxin in the right place Higher auxin levels at the right moment and in the right place result in better growth and greater harvest.Better adjustment of auxin levels would make plants grow more efficiently.The researchers hope to contribute to the development of more efficient growing processes by continuing to sort out auxin transport processes.
【语篇解读】本文叙述了现代研究条件下关于植物生长素(auxin)的研究成果。

1．Which of the following is TRUE of auxin according to the text?
A ．It helps the plant to bend at the right places while growing.
B．It prevents the roots of plants from growing faster.
C． It is no use when the surroundings have changed.
D．It helps the underside of plants grow faster than the topside.
【分析】细节理解题。

植物生长素的功能在第二段中表现的是resulting in the underside growing faster，应选 D。

【答案】D
2．From Paragraph 3 we know that．
A ．the researchers are not so sure if the transport for auxin is a new one
B．the levels of auxin remain the same during the growing processes of plants C．PILS proteins delay the growth of plants
D．PILS proteins play an important part in the transport of auxin
【分析】细节理解题。

由The researchers identified an important new link and means of transport for auxin...可知， PILS proteins 在生长素的流传过程中起着至
关重要的作用。

【答案】D
3 ．According to Paragraph 2，the researchers got their results mainly
by________．
A ．referring to Darwin's theory
B．observing plants straightening
C．doing intensive molecular research
D．watching plants in different places
【分析】细节理解题。

达尔文一开始不过对生长现象感兴趣但并无得出结论，只有此刻的研究者经过了“密集的分子生物学研究”以后才得出结论。

【答案】C
4．Which of the following can be the BEST title for this passage?
A ．Why Plants Grow towards the Light?
B．Darwin's Dream Has Come True
C．How Did Scientists Find Out the Secret?
D．A New Way of the Growing of Plants
【分析】要旨粗心题。

文章一开始就以疑问的方式提出了主题，而后陆续揭露 auxin 的功能。

【答案】A
B
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(花部特点 )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(神经
元 )associated with learning and memory in the rat brain，” Wright said.
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.
【语篇解读】这是一篇科普文。

英国纽卡堡大学的研究小组发现，有些植
物花蜜中的咖啡因会让蜜蜂喜悦，提高它们的记忆力，进而产生更好的授粉成效。

这一研究成就无疑会对农作物产量的提高拥有十分重要的意义。

5．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.
【分析】事实细节题。

由第五段“...similar to that produced by caffeine in neurons(神经元 ) associated with learning and memory in the rat brain”可知 A 项不对；由第六段首句可知 B 项不对；由第三段末句可知 D 项不对。

而依据第二段“...such as those from grapefruit and lemon plants, as well as certain coffee flowers, contains low doses of caffeine”. 一句可知 C 项是正确的。

【答案】C
6．After reading the passage，John，who works in the farming industry, will probably feel________．
A ．annoyed C．nervous B．angry D．excited
【分析】推理判断题。

植物授粉的过程及成效与含有咖啡因的花蜜亲密相
关，这项研究结果用于农业生产会大大提高授粉质量，进而利于农作物增产。

故答案为D。

【答案】D
7．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
【分析】推理判断题。

依据第一段“Caffeine can improve memory among honeybees and lead to better pollination(授粉 )．”及第四段“Improved memory led to the better pollination.”可知，蜜蜂吸食含有咖啡因的花蜜以后记忆力就会加强，它们就会找寻更多含有咖啡因的花蜜，这样就能更好的达成植物的授粉。

故答案选B。

【答案】B
8．What section of a newspaper may this passage be taken from?
A ．Science. C．Culture.B．Education. D．Sports.
【分析】文章根源题。

研究人员发现，花蜜中的咖啡因能够提高蜜蜂的记
忆力进而会致使授粉成效。

明显该短文属于科学研究成就。

此外，由短文首段末
句也可知答案非 A 莫属。

【答案】A
Ⅲ.短文改错【导学号：15680044】
With the development of society, the earth is being damaged by people who are seeking comfortable at all cost. The sky is no longer blue. The air is no longer fresh. The rivers are no longer clean.
Many animals and plants are disappearing the earth. And the size of deserts are growing rapidly every year. Our planet have been serious polluted. We all know what we have only one home. If we continue pollute it, the earth will turn out to be a planet which is fit for us to live on. Saving the earth means save ourselves. Let's take action without any delay.
【答案】
With the development of society, the earth is being damaged by people who are comfortable cost
seeking comfort at all costs. The sky is no longer blue. The air is no longer fresh.
The rivers are no longer clean.
Many animals and plants are disappearing the earth. And the size of are have serious
deserts is growing rapidly every year. Our planet has been seriously polluted.
what pollute
We all know that we have only one home. If we continue polluting it, the earth
will turn out to be a planet which is unfit for us to live on. Saving the earth
save
means saving ourselves. Let's take action without any delay.。