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How many orchid seeds are typically pollinated at one time?A.No specific figure is given i

How many orchid seeds are typically pollinated at one time?

A.No specific figure is given in the passgae.

B.2,000.

C.20,000.

D.200,000.

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更多“How many orchid seeds are typi…”相关的问题
第1题
CThere are many different kinds of peaches (桃). One clear difference is the one between c

C

There are many different kinds of peaches (桃). One clear difference is the one between clingstone-fruit in which the flesh is stuck to the seed inside-and freestone -that in which the seed floats freely. Customers prefer freestone peaches because they don't want to struggle to get the flesh away from the seed.

And that's how it goes in stone fruit land. Plant breeders(培育者) are trying all the time to im- prove the old favorites. Frequently , the changes are designed to meet the demands of the growers or packers. One very delicious family of peach varieties has nearly disappeared because it forms a small"beak" at the bottom of the fruit. That little point is likely to break during packing and shipping, opening the door to spoilage(腐烂) .

This is certainly not to say that the wants of customers are not important. In fact, they drive some of the most important changes. One thing customers like is red-lots of red. Peaches used to be prized for golden skin;now people are buying red, regarding it as a sign of ripeness.

But red has a hold on people. There's a story told by those in the stone fruit industry about a marketing experiment. A group of people were given two peaches : one a fairly tasteless red variety , the other a great-tasting gold. Sitting around, tasting and talking about the fruit, the group all agreed that the gold was a much better peach and that was the one they would buy. Then, on the way out the door, they were offered boxes of peaches as a thank-you gift. One held the preferred golden fruit, the other the red. To a person, they picked the red fruit to take home. Red sells.

64. What does the word" stone" mean in the text?

[A] The hard seed inside a fruit.

[B] Containers that packers use.

[C] Small rocks found in the fields.

[D] Soft beaks at the bottom of the fruit.

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第2题
There are many different kinds of peaches (桃). One clear difference is the one between cl

There are many different kinds of peaches (桃). One clear difference is the one between clingstone—fruit in which the flesh is stuck to the seed inside—and freestone —that in which the seed floats freely. Customers prefer freestone peaches because they don't want to struggle to get the flesh away from the seed.

And that's how it goes in stone fruit land. Plant breeders(培育者) are trying all the time to improve the old favorites. Frequently, the changes are designed to meet the demands of the growers or packers. One very delicious family of peach varieties has nearly disappeared because it forms a small "beak" at the bottom of the fruit. That little point is likely to break during packing and shipping, opening the door to spoilage(腐烂).

This is certainly not to say that the wants of customers are not important. In fact, they drive some of the most important changes. One thing customers like is red—lots of red. Peaches used to be prized for golden skin; now people are buying red, regarding it as a sign of ripeness.

But red has a hold on people. There's a story told by those in the stone fruit industry about a marketing experiment. A group of people were given two peaches: one a fairly tasteless red variety, the other a great-tasting gold. Sitting around, tasting and talking about the fruit, the group all agreed that the gold was a much better peach and that was the one they would buy. Then, on the way out the door, they were offered boxes of peaches as a thank-you gift. One held the preferred golden fruit, the other the red. To a person, they picked the red fruit to take home. Red sells.

What does the word "stone "mean in the text?

A.The hard seed inside a fruit.

B.Containers that packers use.

C.Small rocks found in the fields.

D.Soft beaks at the bottom of the fruit.

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第3题
根据下列文章,请回答 23~30 题。 Cloning (克隆): Future Perfect? 1 A clone is an exact

根据下列文章,请回答 23~30 题。

Cloning (克隆): Future Perfect?

1 A clone is an exact copy of a plant or animal produced from any one ceil. Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997, research into cloning has grown rapidly. In May 1998, scientists in Massachusetts managed to create two identical calves (牛犊) using cloning technology. A mouse has also been cloned successfully. But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement: "We will have managed to clone a human being within the next two years," he told the world. 2 Seed's announcement provoked a lot of media attention, most of it negative, in Europe, nineteen nations have already signed an agreement banning human cloning and in the US the President announced: "We will be introducing a law to ban all human cloning and many states in the US will have passed anti-cloning laws by the end of the year." 3 Many researchers are not so negative about cloning. They are worried that laws banning human cloning will threaten important research. In March, The New England Journal of Medicine called any plan to ban research on cloning humans seriously mistaken. Many researchers also believe that in spite of attempts to ban it, human cloning will have become routine by 2010 because it is impossible to stop the progress of science. 4 Is there reason to fear that cloning will lead to a nightmare world? The public has been bombarded (轰炸) with newspaper articles, television shows and films, as well as cartoons. Such information is often misleading, and makes people wonder what on earth the scientists will be doing next. 5 Within the next five to ten years scientists will probably have found a way of cloning humans. It could be that pretty soon we will be able to choose the person that we want our child to look like. But how would it feel to be a clone among hundreds, the anti-cloners ask. Pretty cool, answer the pro-cloners (赞成克隆的人).

第 23 题 Paragraph 1____________

A.Strong reactions

B.Anxiety about the future of cloning

C.The right to choose

D.What is cloning?

E.Arguments in favor of cloning

F.A common sight

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第4题
Each day, 50,000 shiny, fireenginered apples work their way through a sprawling factory in
Swedesboro, N.J. Inside, 26 machines wash them, core them, peel them, seed them, slice them and chill them. At the end of the line, they are deposited into little green bags featuring a jogging Ronald McDonald.

From there, the bags make their way in refrigerated trucks to thousands of McDonald's restaurants up and down the Eastern Seaboard. No more than 14 days after leaving the plant, the fruit will take the place of French fries in some child's Happy Meal. The apple slices, called Apple Dippers, are a symbol of how McDonald's is trying to offer healthier food to its customers? And to answer the many critics who contend that most of its menu is of poor nutritional quality.

It remains to be seen whether these new offerings will assuage the concerns of public health officials and other critics of McDonald's highly processed fat and calorie—laden sandwiches, drinks and fries. So far, they have notat least not entirely. But this much is already clear: Just as its staple burgerandfries meals have made McDonald's the largest single buyer of beef and potatoes in the country, its new focus on fresh fruits and vegetables is making the company a major player in the $80 billion American produce industry.

The potential impact goes beyond dollars and cents. Some people believe that McDonald's could influence not only the volume, variety and prices of fruit and produce in the nation but also how they are grown.

According to the text, what will be found in some children's Happy Meal instead of French fries?

A.Apple pies.

B.Hamburger.

C.Apple dippers.

D.Apple flavor French.

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第5题
根据以下材料,回答题Clone(1) A clone is an exact copy of a plant or animal produced from an

根据以下材料,回答题

Clone

(1) A clone is an exact copy of a plant or animal produced from any one cell. Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997, research into cloning has grown rapidly. In May 1998, scientists in Massachusetts managed to create two identical calves (牛犊) using cloning technology. A mouse has also been cloned successfully.

But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement: "We will have managed to clone a human being within the next two years," he told the world.

(2) Seed"s announcement provoked a lot of media attention, most of it negative. In Europe,nineteen nations have already signed an agreement banning human cloning and in the US the President announced: "We will be introducing a law to ban all human cloning and many states in the US will have passed anti-cloning laws by the end of the year."

(3) Many researchers are not so negative about cloning. They are worried that laws banning human cloning will threaten important research. In March, The New England Journal of Medicine called any plan to ban research on cloning humans seriously mistaken. Many researchers also believe that in spite of attempts to ban it, human cloning will have become routine by 2010 because it is impossible to stop the progress of science.

(4) Is there a reason to fear that cloning will lead to a nightmare world? The public has been bombarded (轰炸) with newspaper articles, television shows and films, as well as cartoons.

Such information is often misleading, and makes people wonder what on earth the scientists will be doing next.

(5) Within the next five to ten years scientists will probably have found a way of cloning humans,it could be that pretty soon we will be able to choose the person that we want our child to look like. But how would it feel to be. a clone among hundreds, the anti-cloners ask. Pretty cool,

answer the pro-cloners (赞成克隆的人) .

Paragraph 1 __________. 查看材料

A.Strong reactions

B.Anxiety about the future of cloning

C.The right to choose

D.What is cloning

E.Arguments in favor of cloning

F.A common sight

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第6题
Cloning (克窿 ): Future Perfect? 1.A clone is an exact copy of a plant or animal prod

Cloning (克窿 ): Future Perfect?

1.A clone is an exact copy of a plant or animal produced from any one cell. Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997,research .into cloning has grown rapidly. In May 1998, scientists in Massachusetts managed to create two identical calves (牛犊) using cloning technology. A mouse has also been cloned successfully. But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement: "We will have managed to clone a human being within the next two years," he told the world.

2.Seed's announcement provoked a lot of media attention, most of it negative. In Europe, nineteen nations have already signed an agreement banning human cloning and in the US the President announced: "We will be introducing a law to ban all human cloning and many states in the US will have passed anti-cloning laws by the end of the year."

3.Many researchers are not so negative about cloning. They are worried that laws banning human cloning will threaten important research. In March, The New England Journal of Medicine called any plan to ban research on cloning humans seriously mistaken. Many researchers also believe that in spite of attempts to ban it, human cloning will have become routine by 2010 because it is impossible to stop the progress of science.

4.Is there reason to fear that cloning will lead to a nightmare world? The public has been bombarded (轰炸) with newspaper articles, television shows and films, as well as cartoons. Such information is often misleading, and makes people wonder what on earth the scientists will be doing next.

5.Within the next five to ten years scientists will probably have found a way of cloning humans. It could be that pretty soon we will be able to choose the person that we want our child to look like. But how would-it feel to be a clone among hundreds, the anti-cloners ask. Pretty cool, answer the pro-cloners (赞成克窿的人).

第 23 题 Paragraph 1_____________

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第7题
Cloning (克隆): Future Perfect? 1.A clone is an exact copy of a plant or animal prod

Cloning (克隆): Future Perfect?

1.A clone is an exact copy of a plant or animal produced from any one ceil. Since Scottish scientists reported that they had managed to clone a sheep named Dolly in 1997,research into cloning has grown rapidly. In May 1998, scientists in Massachusettsmanaged to create two identical calves (牛犊) using cloning technology. A mouse has also been cloned successfully. But the debate over cloning humans really started when Chicago physicist Richard Seed made a surprising announcement: "We will have managed to clone a human being within the next two years," he told the world.

2.Seed's announcement provoked a lot of media attention, most of it negative. In Europe, nineteen nations have already signed an agreement banning human cloning and in the US the President announced: "We will be introducing a law to ban all human cloning and many states in the US will have passed anti-cloning laws by the end of the year."

3.Many researchers are not so negative about cloning. They are worried that laws banning human cloning will threaten important research. In March, The New England Journal of Medicine called any plan to ban research on cloning humans seriously mitaken. Many researchers also believe that in spite of attempts to ban it, human cloning will have become routine by 2010 because it is impossible to stop the progress of science.

4.Is there reason to fear that cloning will lead to a nightmare world? The public has

been bombarded (轰炸) with newspaper articles, television shows and films, as well as cartoons. Such information is often misleading, and makes people wonder what on earth the scientists will be doing next.

5.Within the next five to ten years scientists will probably have found a way of cloning humans, it could be that pretty soon we will be able to choose the person that we want our child to look like, But how would it feel to be a clone among hundreds, the anti-cloners Askpretty coot, answer the pro-cloners (赞成克隆的我).

第 23 题 Paragraph 1 ___________

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第8题
Read the following passage and the statements that follow. Choose the best answer for each statement from the three choices marked A, B and C .

Read the following passage and the statements that follow. Choose the best answer for each statement from the three choices marked A, B and C .

Outdoor Learning Environment

“How do they get the tomato on the vine(藤、蔓)?”

The question shocked Hillis. It reminded him of the time five years ago when he was volunteering at Beattie Elementary School in his daughter’s kindergarten classroom. He’d been reading the children a book about gardening.

“These kids had only seen vegetables in supermarkets,” he says. “I felt that something important was missing in their lives.”

So he went to work. Hillis and his wife, Sally, made the local government believe that it was necessary to create an outdoor learning environment. He and other volunteers raised more than 30,000 dollars to make such a project. The project was designed like the Platte River. Like the river, the school’s front walkway turns east to west, so they planted things along the walkway, such as native grasses which can be found along the river too.

Today, students are greeted every day by the cedar-mulched creation(雪松覆盖的表面), which spreads the length of three city blocks. In the back, there’s a garden, with twenty 1 ton rocks lying in the ground, where teachers hold classes.

The outdoor effort has changed things inside, too. For science, children plant seeds and, based upon each seed’s size and weight, guess how large a vegetable will grow to become. For arts and crafts, they collect fallen leaves and make designs out of them. Other science lessons make up a large part of the outdoor learning process. “No matter what time of the year it is,” Hillis says, “there’s always something going on.”

1.Hillis was a volunteer at Beatte Elementary School five years ago().

A.Right

B.Wrong

C.Doesn’t say

2.Halloween was first celebrated by the()around the fifth century.

A.English

B.American

C.Irish

D.European

3. The purpose of this course is to make the students know various rules of English grammar().

A.True

B.False

C.Not Mentioned

4.Students can tell how large a tomato will grow to become according to the seed’s size().

A.Right

B.Wrong

C.Doesn’t say

5.Craftsmen need knives and gravers of various types to make complicated patterns().

A.Right

B.Wrong

C.Doesn’t say

6. Which of the following doesn’t belong to the western culture()?

A.Europe

B.North Africa

C.Asia

D.America

7. What is the author’s main idea in the text()?

A.Education can be purchased

B.The difference between education and schooling

C.Degree is worthless

D.Students should learn more important knowledge

8. The settlers also taught the Indians to penetrate the forest, to hunt large animals().

A.True

B.False

C.Not Mentioned

9.The passage is mainly about().

A.parts of the brain that store information

B.illness that results in serious memory loss

C.how human brains process, store and recall information

D.how to improve our memory

10.What do you think “ginseng and gingko” probably are()?

A.Plants

B.Animals

C.Food

D.Drinks

11.Halloween happened().

A.from October 31st to November 1st

B.on October 31st

C.on November 1st

D.between October 31st and November 1st

12. How many cultural differences does the author mention in the text()?

A.One

B.Two

C.Three

D.Four

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第9题
Plants and MankindBotany, the study of plants, occupies a peculiar position in the history

Plants and Mankind

Botany, the study of plants, occupies a peculiar position in the history of human knowledge. We don't know what our Stone Age ancestors (祖先) knew about plants, but from what we can observe of preindustrial societies that still exist, a detailed learning of plants and their properties must be extremely ancient. They have always been enormously (巨大地) important to the welfare of people, not only for food, but also for clothing, weapons, tools, dyes, Medicines, shelter, and many other purposes. Tribes living today in the jungle of the Amazon (亚马逊河) recognize hundreds of plants and know many properties of each. To them botany has no name and is probably not even recognized as a special branch of "knowledge" at all.

Unfortunately, the more industrialized we become the farther away we move from direct contact with plants. And the less distinct our knowledge of botany grows. Yet everyone comes unconsciously on an amazing amount of botanical knowledge, and few people will fail to recognize a rose, an apple, or an orchid (淡紫色的). When our Neolithic (新石器时代) ancestors, living in the Middle East about 10,000 years ago, discovered that certain grasses could be harvested and their seeds planted for richer yields the next season, the first great step in a new association of plants and humans was taken. Grains were discovered and from them flowed the marvel of agriculture: cultivated crops. From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varieties that grew wild and the accumulated knowledge of tens of thousands of years of experience and intimacy with plants in the wild would begin to fade away.

It is logical that a detailed learning of plants and their properties must be extremely ancient.

A.Right

B.Wrong

C.Not mentioned

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