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[主观题]

Orchids are unique in having the most highly developed of all blossoms, in which the usual

male and female reproductive organs are fused in a single structure called the column. The column is designed so that a single pollination will fertilize hundreds of thousands, and in some cases millions, of seeds, so microscopic and light that they are easily carried by the breeze. Surrounding the column are three sepals and three petals, sometimes easily recognizable as such, often distorted into gorgeous, weird, but always functional shapes. The most noticeable of the petals is called the labellum, or lip. It is often dramatically marked as an unmistakable landing strip to attract the specific insect the orchid has chosen as its pollinator.

To lure their pollinators from afar, orchids use appropriately intriguing shapes, colors, and scents. At least 50 different aromatic compounds have been analyzed in the orchid family, each blended to attract one, or at most a few, species of insects or birds. Some orchids even change their scents to interest different insects at different times.

Once the right insect has been attracted, some orchids present all sorts of one-way obstacle courses to make sure it does not leave until pollen has been accurately placed or removed. By such ingenious adaptations to specific pollinators, orchids have avoided the hazards of rampant crossbreeding in the wild, assuring the survival of species as discrete identities. At the same time they have made themselves irresistible to collectors.

The orchid is unique because of______.

A．the habitat in which it lives

B．the structure of its blossom

C．the variety of products that can be made from it

D．the length of its life

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发布时间：2020-10-07

更多“Orchids are unique in having the most highly developed of all blossoms, in which the usual”相关的问题

第1题

Which of the following statements about orchids scents does the passage support？A．They are

Which of the following statements about orchids scents does the passage support？

A．They are effective only when an insect is near the blossom.

B．Harmful insects are repelled by them.

C．They are difficult to tell apart.

D．They may change at different times.

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第2题

The author quotes Hilton Kramer in Para. 2 most probably in order to illustrateA．realism i

The author quotes Hilton Kramer in Para. 2 most probably in order to illustrate

A．realism in Johannes" work.

B．the unique qualities of Johannes" style.

C．the extent of critical approval of Johannes" work.

D．a distinction between sculpture and painting.

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第3题

根据短文的内容回答，下列题目 A Unique Educational CenterIt may look like just another pla

根据短文的内容回答，下列题目

A Unique Educational Center

It may look like just another playgroup, but a unique educational center in Manhattan is really giving babies something to talk about. "It&39;s a school to teach languages to babies and young children with games, songs--some of the classes also have arts and crafts," said Francois Thibaut,the founder of the Langrage Workshop for Children, a place where babies become bilingual.

Children as young as few months are exposed to French and Spanish before many of them can even speak English. Educators use special songs and visual (视觉的) aids to ensure that when a child is ready to talk, the languages will not be so foreign. "Children have a unique capacity to learn many languages at the same time," said Thibaut. "Already at nine months, a child can tell the differences between the sounds he or she has heard since birth and the sounds he or she has never heard yet." Thibaut says the best time to expose children to language is from birth to 3 years old.

For the last 30 years, the school has been using what it calls the Thibaut Technique, a system that combines language lessons with child&39;s play.

"I always wanted to learn Spanish, but by the time I got to high school it was too late to pick it up and speak fluently," said Marc Lazare, who enrolled his son at the school. "I figured at this age,two, it&39;s a perfect time for him to learn."

Aside from learning a language, the kids also gain a tremendous sense of confidence. One young student boasted that aside from French, she can speak five languages (though that included "monkey" and "lion"). The school gives children the tools to communicate, and sometimes that gives them an advantage over their parents. "I think they sometimes speak French when they think I won&39;t understand them," said parent Foster Gibbons.

Depending on the age group, classes run from 45 minutes up to 2 hours. Even when students are not in class, the program is designed to make sure the learning continues at home. Tapes and books are included so kids can practice on their own.

The word "bilingual" in the first paragraph probably means__________. 查看材料

A.capable of using two languages

B.both clever and confident

C.aware of their own limitations and strengths

D.independent of their parents

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第4题

听力原文：Welcome to Kaziranga National Park. I am Dev, your guide for today. You will see

the unique one-horned rhino in its natural habitat further on. The trained elephants here will take us on this tour. Please follow the directions of the other guides to climb up and get off of the seats on the elephant's back. I will point out the other distinctive wildlife in this area as we go along. Please speak softly and avoid sudden movements so that we do not disturb or provoke the animals. You may, however, take pictures.

Who is the speaker？

A．An animal trainer.

B．A wildlife photographer.

C．A tourist.

D．A nature guide.

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第5题

To: Kelly Hoffman ＜kelly@glipublishing.com＞ From: Henry Samuel ＜henry@glipublishi

To: Kelly Hoffman ＜kelly@glipublishing.com＞

From: Henry Samuel ＜henry@glipublishing.com＞

Date: December 23

Subject: Difficulty accessing the Internet

Dear Ms. Kelly Hoffman,

I suddenly had difficulty accessing the Internet. I had no problem accessing outside web sites this morning. But since I returned from lunch, I haven' t been able to access web sites outside of the company's networks. I contacted the technical support manager immediately, but I haven't gotten a response yet.

My colleague, Ms. Carol Hewitt, said you helped her solve her technical problem before and suggested I make a call to you directly. Is there a problem with the company's Internet connection or is this problem unique to my workstation？

Thank you very much for your help.

To: Henry Samuel ＜henry@glipublishing.com＞

From: Kelly Hoffman ＜kelly@glipublishing.com＞

Date: December 23

Re: Problem with access to the Internet

Dear Mr. Henry Samuel,

I'm very sorry for the inconvenience. Our technical support manager, Mr. Keith Wilson usually handles Internet problems but he will be out of the office until December 27, 2007.

The failure of access seems to be occurring randomly. Almost all employees still have full online access but your workstation must be one of the ones that are experiencing connection problems today. To determine the cause of the problem and prevent it from happening again, I have forwarded your e-mail to our system administrators for further investigation. I expect to have the situation resolved within an hour.

In the meantime, please delete your temporary Internet files. These files may have become corrupted and could possibly be contributing to the problem. Instructions for deleting the files can be found in your employee manuals.

I will be leaving the office at 4 p.m. today. If you need further assistance after that time, please contact Mr. Gavin Newsom, my assistant.

Kelly Hoffman

Technical Support Department

What is true about Mr. Henry Samuel' s computer problem？

A．The problem first happened in the morning.

B．The problem is unique to his workstation.

C．The problem is the result of running too many programs.

D．The cause of the problem has not been identified.

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第6题

Irish Dolphins May Have a Unique DialectIrish scientists monitoring dolphins living in a r

Irish Dolphins May Have a Unique Dialect

Irish scientists monitoring dolphins living in a river estuary in the southwest of the country believe they may have developed a unique dialect to communicate with each other.

The Channel Dolphin and Wildlife Foundation (SDWF) has been studying a group of up to 120 bottle-nose dolphins in the River Shannon using vocalisations collected on a computer in a cow shed near the River Shannon.

As part of a research project, student Ronan Hickey digitised and analysed a total of 1,882 whistles from the Irish dolphins and those from the Welsh dolphins on a computer and separated them into six fundamental whistle types and 32 different categories. Of the categories, he found most were used by both sets of dolphins—but eight were only heard from the Irish dolphins.

"We are building up a catalogue of the different whistle types they use and trying to associate them with behaviour like foraging, resting, socialising and the communications of groups with calves," project leader Simon Berrow said. "Essentially we are building up what is like a dictionary of words they use or sounds they make. "

Berrow, a marine biologist, said the dolphins' clicks are used to find their way around and locate prey. The whistles are communications. "They do a whole range of other sounds like barks, groans and a kind of gunshot. " He said. "The gunshot is an intense pulse of sound. Sperm whales use it to stun their prey. "

"When I first heard it I was surprised as I thought sperm whales were the only species who used it. We can speculate the dolphins are using it for the same reason as the sperm whales. " Berrow said.

References in local legend indicate there have been dolphins in the Shannon estuary for generations and they may even have been resident there as far back as the 6th century.

They are regularly seen by passengers on the Shannon ferry and an estimated 25,000 tourists every year take special sightseeing tours on local boats to visit them.

The difference in eating habits between the bottle-nose dolphins and the sperm whales interested the SDWF scientists.

A．Right

B．Wrong

C．Not mentioned

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第7题

Question : Mr. President, I’m sure millions of Chinese people are watching this program

now . Iwonder if you would like to say a few words to them first.Answer: Well, I do have an opening statement. But first let me thank you for this unique opportunity. It’s a great honor for me to be the first American president to speak to the Chinese people in a live broadcast. And I feel as if I were talking to old friends, who, while teen years ageo, Barbara and Icame to your beautiful land when I was , as you said , Chief of the United States Liaison Office , And for us , returning to Beijing is a homecoming. Our work here was a source of great personal satisfaction, a happy challenging time in our lives. And we actually went to church here, and indeed our daughter was baptized in our faith here. And we rode bicycles down the hutungs of Beijing, and came to have a general feeling of affection for the Chinese people.

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第8题

Irish Dolphins may have a unique dialect Irish scientists monitoring dolphins living i

Irish Dolphins may have a unique dialect

Irish scientists monitoring dolphins living in a river estuary in the southwest of the c,ountry believe they may have developed a unique dialect to communicate with each other．

The Shannon Dolphin and Wildlife Foundation（SDWF）has been studying a group of up to 120 bottle—nose dolphins in the River Shannon using vocalisations collected on a computer in a cowshed near the River Shannon．

As part of a research project．student Ronan Hickey digitised and analysed a total of 1，882 whisties from the Irish dolphins and those from the Welsh dolphins on a computer and separated them into six fundamental whistle types and 32 different eategories．0f the categories，he found most6 were used by both sets of dolphins一but eight were only heard from the Irish dolphins．

“We are building up a catalogue 0f the different whistle types they use and trying to associate them with behaviour like foraging，resting，socialising and the communications of groups with calves”project leader Simon Below said．“Essentially we are building up what is like a dictionary 0f words they use 0r sounds they make．”

Below，a nlan’ne biologist，said the dolphins’clicks are used t0 find their way around and locate prey．The whistles are communications．“They d0 a whole range 0f other sounds like barks，groans and a kind 0f gunshot．”he said．“The gunshot is an intense pulse of sound．Sperm whales use it t0 stun their prey．”

“When I first heard it 1 was surprised as I thought sperm whales were the only species who used it．We can speculate the dolphins are usin’g it for the same reason as the sperm whales，”Berrow said．

References in local legend indicate there have been dolphins in the Shannon estuary for generatl’ons and they may even have been resident there as far back as the 6th century9．

They are regularly seen by passengers 0n the Shannon ferry and an estimated 25，000 tourists every year take special sightseeing tours on local boats t0 visit them．

第 16 题 The difference in eating habits between the bottle-nose dolphins and the sperm whales interested the SDWF scientists．

A．Right

B．Wrong

C．Not mentioned

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第9题

听力原文：Welcome to Emmerson National Park. I'm Dean and this is Dan and we'll be your gui

听力原文： Welcome to Emmerson National Park. I'm Dean and this is Dan and we'll be your guides today on what is sure to be a wonderful experience. We are delighted to be assisting you in experiencing the flora that is unique to Emmerson National Park. Following the tour of the park, we'll be having lunch at the Atrium located in the visitors' center. The spring season has fully arrived so you will be able to see that everything is in full bloom. Some of our species of plants do not exist in any other country in the world, so have your cameras ready, but please do not touch any of the plants. It's also important to remember that littering of any sort is strictly prohibited. Please put all of your trash into the garbage canisters provided in the park.

Who is the speaker？

A．A security guard

B．A tour guide

C．The park ranger

D．A park guest

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第10题

I took along my son, who had never had any fresh water up his nose and who had seen lily p

ads only from train windows. On the journey over to the lake I began to wonder what it would be like. I wondered how time would have marred this unique, this holy spot—the coves and streams, the hills that the sun set behind, the camps and the paths behind the camps. I was sure that the tarred road would have found it out and I wondered in what other ways it would be desolated. It is strange how much you can remember about places like that once you allow your mind to return into the grooves which lead back. You remember one thing, and that suddenly reminds you of another thing. I guess I remembered clearest of all the early mornings, when the lake was cool and motionless, remembered how the bedroom smelled of the lumber it was made of and of the wet woods whose scent entered through the screen. The partitions in the camp were thin and did not extend clear to the top of the rooms, and as I was always the first up I would dress softly so as not to wake the others, and sneak out into the sweet outdoors and start out in the canoe, keeping close along the shore in the long shadows of the pines. I remembered being very careful never to rub my paddle against the gunwale for fear of disturbing the stillness of the cathedral.

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