Science Daily (Apr 27, 2008) — Dutch ecologist Roxina Soler and her colleagues have discovered that subterranean (地下的) and aboveground herbivorous (食草的) insects can communicate with each other by using plants as telephones. Subterranean insects issue chemical warning signals through the leaves of the plant. This way, aboveground insects are warned that the plant is already “occupied”.
Aboveground, leaf-eating insects prefer plants that have not yet been occupied by subterranean root-eating insects. Subterranean insects send out chemical signals through the leaves of the plant, which warn the aboveground insects about their presence. This messaging makes it possible for spatially-separated insects to avoid each other, so that they do not compete for the same plant.
In recent years it has been discovered that different types of aboveground insects develop slowly if they feed on plants that also have subterranean residents and vice versa (反之亦然). It seems that a system has developed through natural selection, which helps the subterranean and aboveground insects to notice each other. This avoids unnecessary competition.
Through the “green telephone lines”, subterranean insects can also communicate with a third party, namely the natural enemy of caterpillars (毛虫). Parasitic wasps (寄生的黄蜂) lay their eggs inside aboveground insects. The wasps also benefit from the signals sent by the leaves, as these help them find more insects for their eggs.
The communication between subterranean and aboveground insects has only been studied in a few cases. It is still not clear how widespread this phenomenon is. But scientists are looking into it. This research was carried out at the Netherlands Institute for Ecology (NIOO-KNAW) by Roxina Soler, Jeffrey Harvey, Martijn Bezemer, Wim van der Putten and Louise Vet. The PhD project, in which this study was carried out, was funded by the Free Competition of NWO Earth and Life Sciences.
51. After finding a plant occupied by subterranean insects, aboveground insects usually ____.
A. send out warning signals B. choose to give up the plant
C. compete for the plant D. share it with the subterranean insects
52. Aboveground insects will develop more quickly if they ____.
A. feed on plants occupied by subterranean insects
B. feed on plants not occupied by subterranean insects
C. become cleverer through natural selection
D. compete with subterranean insects
53. Subterranean insects communicate with a third party through ____.
A. caterpillars B. parasitic wasps C. wasps’ eggs D. a plant’s leaves
54. What can be inferred from the last paragraph?
A. Other animals may communicate in the same way.
B. There will be further research into this phenomenon.
C. Part of the study is a PhD project.
D. The Free Completion of NWO Earth and Life Sciences has the patent for these results.
55. What would be the best title for this passage?
A. Insects use plants as a telephone. B. Insects live in harmony with each other.
C. No species can live alone. D. Plants and animals have an effect on each other.
A 17-year-old boy, caught sending text messages in class, was recently sent to the vice principal's office at Millwood High School in Halifax, Nova Scotia．The vice principal, Steve Gallagher, told the boy he needed to focus on the teacher, not his cellphone．The boy listened politely and nodded, and that's when Mr．Gallagher noticed the student’s fingers moving on his lap．He was texting while being scolded for texting．“It was a subconscious act,” says Mr．Gallagher, who took the phone away．“Young people today are connected socially from the moment they open their eyes in the morning until they close their eyes at night．It’s compulsive．”
A study this year by psychology students at Covenant College in Lookout Mountain, Ga．, found that the more time young people spend on Facebook, the more likely they are to have lower grades and weaker study habits．Heavy Facebook users show signs of being more sociable, but they are also more likely to be anxious, hostile or depressed．（ Doctors, meanwhile, are now blaming addictions to “night texting” for disturbing the sleep patterns of teens．）
Almost a quarter of today’s teens check Facebook more than 10 times a day, according to a 2009 survey by Common Sense Media, a nonprofit group that monitors media’s impact on families．Will these young people get rid of this habit once they enter the work force, or will employers come to see texting and “social-network checking” as accepted parts of the workday? k5u
Think back．When today’s older workers were in their 20s, they might have taken a break on the job to call friends and make after-work plans．In those earlier eras, companies discouraged non-business-related calls, and someone who made personal calls all day risked being fired．It was impossible to imagine the constant back-and-forth texting that defines interactions among young people today．
Educators are also being asked by parents, students and educational strategists to reconsider their rules．“In past generations, students got in trouble for passing notes in class．Now students are adept（熟练的） at texting with their phones still in their pockets,” says 40-year-old Mr．Gallagher, the vice principal, “and they’re able to communicate with someone one floor down and three rows over．Students are just fundamentally different today．They will take suspensions rather than give up their phones．” .
1．The underlined word “a subconscious act” refers to an act __________．
A．on purpose B．without realization
C．in secret D．with care
2．Young people addicted to the use of Facebook _________．
A．are good at dealing with the social relationships and concentrate on their study
B．have high spirits and positive attitudes towards their life and work
C．have been influenced mentally in the aspects of behaviors and habits
D．are always in bad mood and have poor performance in every aspect
3．Through the situation of today’s older workers in their 20s, it can be inferred that ___．
A．the employers will accept young people’s sending text messages
B．a cellphone is a must for today’s older workers instead of young people
C．the employers prefer older workers to young people
D．the employers will find it hard to control the interaction among young people
4．Mr．Gallagher reminds us that the students in the past and those today _________．
A．like to break rules and have the same means of sending messages
B．are always the big problem for the educators and their parents
C．like sending text messages but those today do it in a more secret and skillful way
D．cannot live without a cellphone
5．What’s the best title of the passage?
A．Teenagers and Cellphones B．Teenagers’ Texting Addiction
C．Employers and Teenagers D．Teenagers’ Education
|
1．Which one of the following activities requires the longest time to complete?
A．Fun in Mandarin
B．Fairytale Holiday Chinese Camp
C．Magic Moments English Speech and Drama Camp
D．Magic Moments Mandarin Speech and Drama Camp
2．If you want your son to learn some table manners, which of the following activities can you register him in?
A．Baking Workshop B．Lollipops Life Science
C．Flower anti Card Making D．Kids’ Dining Etiquette course
3．Which of the following statements is true?
A．Participators need not bring any materials for the activities．
B．All activities are aimed at primary school children only．
C．All participants will receive a free gift upon registration．
D．All activities are organized throughout the year．
4．A couple with three children aged 6, 9 and 14 want them to attend the same activities together．The number of activities they can attend is_______ ．
A．one B．two C．three D．four
We’ve used the wind as an energy source for a long time．
The Babylonians and Chinese were using wind power to
pump water for irrigating crops 4,000 years ago, and sailing
boats were around long before that．Wind power was used in the
Middle Ages, in Europe, to grind（磨碎） corn, which is where
the term “windmill” comes from．
We can use the energy in the wind by building a tall tower, with a large propellor（螺旋桨） on the top．The wind blows the propellor round, which turns a generator to produce electricity．We tend to build many of these towers together, to make a “wind farm” and produce more electricity．The more towers, the more wind, and the larger the propellors, the more electricity we can make．It's only worth building wind farms in places that have strong, steady winds, although boats and caravans（大篷车）increasingly have small wind generators to help keep their batteries charged．
The best places for wind farms are in coastal areas, at the tops of rounded hills, open plains and gaps in mountains — places where the wind is strong and reliable．Some are offshore．To be worthwhile, you need an average wind speed of around 25 km/h．Most wind farms in the UK are in Cornwall or Wales．Isolated places such as farms may have their own wind generators．In California, several “wind farms” supply electricity to homes around Los Angeles．
The propellors are large, to obtain energy from the largest possible volume of air．The blades can be angled to cope with varying wind speeds．Some designs use vertical turbines （垂直涡轮机）, which don’t need to be turned to face the wind．The towers are tall, to get the propellors as high as possible, up to where the wind is stronger．This means that the land beneath can still be used for farming．
1．The first paragraph aims to introduce to us _______．
A．the function of wind power B．the source of wind power
C．the nations using wind power D．the history of using wind power
2．The best places for building the wind farm are places where _______．
A．boats and caravans can often be seen B．isolated farms don’t have enough electricity
C．there are less human activities D．the wind is strong and reliable
3．We can infer from the passage that _______．
A．wind farms will not take up too much farming land
B．wind farms need no fuel because wind is free
C．the blades can be angled to turn to face the wind wherever it comes from
D．the higher and larger the towers are, the stronger the wind is
4．What can be a suitable title for the passage?
A．Where to build a wind farm． B．ABC of the using of wind energy．
C．How to make best use of wind． D．Wind energy is the best energy．
第三部分 阅读理解（共20小题，每题2分，满分40分）
The writing of Shakespeare are today little read by young people in Britain．His young readership is limited to those who choose to study literature at university．
Shakespeare’s work, together with most other classics, is seen as remote, and written in a 400-year- old version of English that is about as inviting as toothache．
Still, in British schools, it is necessary to study the poet, and when something is made compulsory, usually the result is boredom, resentment（憎恨） or both．
This was my experience of the classics at school．But when I reached my late teenage years, I had a change of heart．Like every other young person since the dawn of time, the world confused me．I wanted answers, so I turned to books to find them．
I went on to take a PhD in literature and have taught it in Britain and China．I have never regretted it．There is something in literature that people want, even if they don’t read books．You see this in the popularity of TV and movie adaptations of great works, the recent film version of Jane Austen’s Pride and Prejudice being a case in point．These popular adaptations may help increase people’s interest in the classics．
Reading a simplified Romeo and Juliet may perhaps lead to a reading of Shakespeare’s actual plays．If that is the case, then I welcome the trend．But do not make the mistake of thinking that it is the same thing．Shakespeare is a poet．His greatness is in his language．Reading someone else’s rewriting of his works is like peeling a banana, throwing away the fruit, and eating the skin．Take on the original．It really is worth the effort．
1．Which of the following is true according to the passage?
A．The language used in classics is no longer in use today．
B．British students usually find compulsory reading dull．
C．Only those studying literature read Shakespeare’s works．
D．For British people, Shakespeare’s works are no longer classics．
2．According to the passage, the writer _____ ．
A．has liked literary classics since an early age
B．was forced to read the classics for a PhD
C．turned to literature to seek answers in his teens
D．thinks only people who read books like literature
3．The underlined phrase “a case in point” in Paragraph 5 is closest in meaning to “_____”．
A．a great hit B．a good example
C．a movie adaptation D．a popular phenomenon
4．What does the writer intend to tell us in the last paragraph?
A．The fruit of a banana is more useful than its skin．
B．The rewriting trend does more harm than good．
C．Readers should try to read the original versions．
D．Readers need to learn the language in the classics．
Molly Wilson had been a dancer and a mother for many years when she decided to sail round the world to raise money for charity.
As a child she had trained as a ballet dancer, but at 15 she had grown too tall for classical ballet, so she became a member of a pop dance team.
She got married, and after she had children she retired from show business to bring them up. They grew up, and when they were 18 they left home.
She says, “When I decided to do the round-the-world race, my husband thought I was bored because the children had left home. He was also worried because I had never sailed before. I was not bored, but I had met some people who told me about the race.
They had taken part in it, but they had only done one section, say, from New Zealand to Australia. I wanted to do the whole ten-month journey.”
Before Molly left she did a lot of training, but it hadn’t prepared her for the worst weather which they experienced. She tells one story. “One night the sea was very rough and it was very cold. I had gone downstairs when a hug
e wave smashed into the boat and injured two men on the deck. One of the men couldn’t move because he had broken his leg. They were taken to hospital by helicopter. That was the worst time.”
By the end of October last year, she had raised more than £50,000 for charity.
She says, “Sometimes I ask myself, what did I do? How did I do it? But then I think, it’s the same as being a dancer. Before I left on the trip, I had trained hard. I had got very fit and had prepared myself completely. Then on the trip I was simply a good team member.”
1. When I decided to do the round-the-world race, my husband thought I felt_________.
A. dissatisfied because I had nothing better to do at home
B. annoyed because I had to wait long for my children to come back home
C. sad because all the children left me when they grew up
D. happy because I could do something I was interested in instead of taking care of children
2. The word “section” in paragraph 5 most probably refers to _________.
A. group of people B. part of the training
C. part of the job D. part of the route of sail
3. Which of the following is closest in meaning to “rough” in Para. 5?
A. not exact B. not smooth because of huge waves
C. difficult D. pleasant
4. The last paragraph suggests that _________.
A. she should be kind to other team members during the trip
B. many years of dancing had already prepared her for the sail completely, so she needn’t do anything before the journey
C. the qualities she needed for the trip were the same as those for a dancer
D. 
she should not forget dancing during the trip
粤公网安备 44130202000953号