Monarch butterflies（黑脈金斑蝶）are a common summer sight in the northern United States and Canada . These large orange and black insects（昆蟲）brighten parks and gardens as they fly lightly among the flowers . What makes monarchs particularly interesting is that they migrate（遷飛）-all the way to California or Mexico and back . They are thought to be the only insect that does this .

       Every year in the late summer monarchs begin their journey to the south . Those heading for Mexico go first for the Louisiana-Mississippi area , then fly across the Gulf of Mexico into Texas . Once in Mexico , they settle themselves in one of about fifteen places in a mountain forest filled with fir trees . Each place provides a winter home for millions of monarchs . The butterflies are so many that they often cover entire trees . When spring comes , they begin their long journey north . 

The question is often asked whether every butterfly makes the round-trip journey every year . And the answer is no . The average monarch lives about nine months . So one flying north might lay eggs in Louisiana and then die . The eggs of that generation may be found in Kentucky ; the eggs of the next generation may end up in Wisconsin or Michigan . The last generation of the season , about the fourth , will make their way back to Mexico and restart the journey .

       Scientists learn about monarchs’ migration by catching and making marks on the insects . By

recatching a monarch with such a mark and noticing where it came from , the next scientist can get to know things like the butterfly’s age and its routing（路線）.

1. One of the places where monarchs spend the winter is       .

A. the Gulf of Mexico                             B. an area in Mississippi

C. a forest in Mexico                             D. a plain in Texas

2 The routing of monarchs’ migration can be learned       .

A. by examining the marks made on them

B. by collecting their eggs in the mountains

C. by comparing their different ages

D. by counting the dead ones in the forests

3. What is the subject discussed in the passage ?

A. Migration of monarchs .                               B. Scientists’ interest in monarchs .

C. Winter home of monarchs .                           D. Life and death of monarchs .

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

（共5小題；每小題2分，滿分10分）

根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

Two brightly colored butterflies have just flown by. They seems to be exactly alike, but actually one is a little larger than the other.  The smaller one has a wingspread of less than three inches and also a black line on its back wings.

           At first sight, it is hard to tell them apart. Would you guess from this that they are different-sized butterflies of the same species?   If you said yes to either question, you would be wrong, for these look-alikes belong to quite different families.

           The larger insect is the monarch butterfly (黑脈金斑蝶). As a baby insect, the monarch feeds on milkweed, which seems to give the monarch a disagreeable taste and smell.     Birds that eat butterflies soon recognize the monarch and quickly learn to leave it alone.

    Birds would find this insect tasty, but because it looks like the monarch, birds keep away from it. The viceroy’s similarity to the monarch gives it some protection from its enemies and helps it survive.

There are other pairs of look-alike butterflies, bees and moths. In each case, one either has a disagreeable taste or smell, or can give a painful sting (叮咬). The larger is called the model.     （詞數(shù)206）

A. The smaller insect is the viceroy (副王峽蝶), which feeds on the leaves of trees.

B. The larger insect has a wingspread (翼長(zhǎng)) of up to four inches.

C. The bright coloring of the monarch acts as a warning sign to its enemy.

D. Birds protect their babies from eating such dangerous enemies.

E. The insect that imitates this model for protection is called the mimic（保護(hù)色）.

F. Or that they are different species of butterflies but close relatives belonging to the same family?

G. Do you like this kind of special species?

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

A woman decorating her Christmas tree Monday was shot in her left arm when a bullet went through her living room window．Police said the incident occurred at about 5:00 p.m. A .22 caliber shell（口徑的彈殼） casing was found across the street from the victim's home．Police did not find a weapon in the neighborhood．

Mrs．Wilma Johnson was treated at a local hospital and allowed to go home．A hospital spokesman said she should recover nicely．She is in her late 50s, divorced, and living with Bob, the older of her two adult sons．Bob wasn’t home at the time of the shooting．

Police will patrol the area more frequently as a result of this shooting．They don't know if the shooting was intentional or accidental．They are asking the public to help if they know anything．They interviewed the neighbors．One neighbor said he heard a gunshot, but in this neighborhood, he said, he was used to hearing gunshots．

The police also questioned Mrs．Johnson’s ex-husband, Joe, who lives three blocks away．Joe said if he was going to shoot at his ex-wife, he’d make sure he shot her in her butt（頭）．“That’s a target you could hit from a mile away as she is like a Tele-tubby.” he laughed．Despite such remarks, the police spokesperson said Joe is not a suspect at this time．

What was the woman doing when she was shot?

       A．She was decorating her room．                    B． She was cooking dinner．

       C．She was sleeping in her room.      D． She was decorating her Christmas tree．

Where is Mrs. Wilma Johnson now ?

       A．She is in hospital．                                 B． She is at home．

       C．She is in another world.                           D． She is in a funeral．    

Which of the following is true according to the third paragraph?

       A．Some neighbors saw the gunman by accident.

       B．The police found the gunman soon after the gunshot．

       C．There used to be gunshots in the area.

       D．The gunshot happened by intention.

What was her ex-husband’s words “That’s a target you could hit from a mile away”?

       A. His ex-wife was too fat                                 B．He still loved his ex-wife．

       C．She was sensitive to anything.                     D． He hated his ex-wife．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

Monarch Butterflies

 One of the last West Coast homes of the Monarch butterfly，a type of insect（昆蟲），may soon disappear．Strangely，it is in a town that calls itself Butterfly U．S．A，Pacific Grove, California．

 The  town  of Pacific Grove loves the butterflies．Every year they have a parade（游行）and hundreds of children dress up as butterflies．Monarch butterflies are the town mascot．Tourism is very important，and many people come to see the butterflies．The butterflies are good for the development of the town．

 In 1981 there were so many butterflies it looked like it was raining butterflies．Tens of thousands of Monarchs stayed on tree branches near Pacific Grove．Now there are not so many．

The building goes on a little bit at a time，and you don’t notice it day by day．Over time，you can see that there has been a lot of development．As new buildings go up，many trees are cut down．

This reduces the natural homes for the butterflies．

Monarchs travel hundreds of miles each year，returning to the same woods，often to the same trees．The female Monarchs need milkweed to lay their eggs；the males will follow the females．

Millions of Monarchs have traveled regularly along the same path for thousands of years．They start their trip in the mountains of Mexico and travel to the middle part of America．If the woods where the butterflies live are destroyed，the whole species（物種）could be lost．There have been Monarch butterflies along the coast of California for as long as man can remember，but no one is sure how much longer they will last．

36．Why are Monarch butterflies important to Pacific Grove？

A.        They may disappear．            

B.        They come to stay every year．

C.        They help develop the town’s tourism．

D.       They give a name to Pacific Grove．

37．The underlined word  “mascot”in Paragraph 2 probably refers to_________.

A.        a new type of butterfly          

B.        an insect believed to bring good luck

C.        a parade organized by Pacific Grove 

D.       a special dress for children in Pacific Grove

38．What problem do Monarch butterflies face now？

A.        New buildings take up their living space．

B.        There has been too much rain m recent years．

C.        Their natural homes are destroyed by tourism．

D.       They have tot travel a long distance to get home．

39．Where do Monarch butterflies start their trip to Pacific Grove？

A.        From Central America．

B.        From the West Coast．

C.        From California．      

D.       From Mexico．

                        

 

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2011-2012學(xué)年廣州省廣州市高三綜合測(cè)試（一）英語(yǔ)試題 題型：閱讀理解

Many psychologists in the early twentieth century believed that humans use only 10 percent of their brains, and even the great Albert Einstein once wrote that most people use only a small portion of the grey matter between their ears. It's a theory that has often been put forward in television documentaries; magazines, advertisements and books over the past century.

         But nearly all scientists now agree the 10 percent theory is completely unfounded. In fact, they question how this figure was ever arrived at in the first place and what areas of the brain are supposed to be unneeded. The theory supposes that if 90 percent of the brain were removed, a person would Still be able to function normally, while in reality it is known that damage to even a small area of the brain can result in extremely serious physical injury different activities and that many areas of the brain are used at the same time for some complex activities or thought processes.

         Throughout the course of one day, most .areas of the brain are active at some time, even during sleep. The 10 percent theory suggests that certain areas o' the brain are not used, but scans slow activities throughout the entire brain and not in any separate part. The final argument against the 10 percent theory is the fact that doctors carefully map the brain before removing brain cancers so that they don't affect other essential areas.

         From an evolutionary point of view, it's highly unlikely butt our comparatively larger brains would have evolved from our ancestors if the extra areas were not needed. In fact, there is absolutely no evidence support the 1p percent theory.

1.How did the 10 percent theory get such widespread popularity?

   A. It was promoted in various types of copular media.

   B. Albert Einstein argued strongly in support.

   C. It was proven in scientific research.

   D. Few people could prove it wrong.

2.The underlined word "unfounded" is chest in meaning to _________.

   A. undiscovered         B. unproven        C. unknown        D. unnecessary

3.Which of the following is true according to the writer?

   A. We use less than 10% of our brains.

   B. Most brain disorders affect the same part of the brain.

   C. The brain is less active during times of sleep.

   D. The 10 percent theory does not make evolutionary sense.

4.What can we infer from the passage?

   A. People today use more of their brain than in the past.

   B. Scientific opinion about the topic of brain use is equally divided.

   C. Our understanding of the brain has changed greatly in the past decades.

   D. Modern scientists have a complete picture of how the brain works.

5.What is the main purpose of the passage?

   A. To present two sides of brain theory.

   B. To criticize the 10 percent theory.

   C. To explain how brain works.

   D. To describe the history of brain research.

 

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2010-2011學(xué)年浙江省杭州市高三上學(xué)期第三次月考英語(yǔ)試卷 題型：閱讀理解

閱讀下列短文，從每題所給的A、B、C、D四個(gè)選項(xiàng)中，選出最佳選項(xiàng)。

　　　　　　　　　　　Ａ

Researchers who helped discover a new species of Mexican butterfly are offering to sell the naming rights to raise money to fund more research. Co-discoverer Andrew Warren is hoping to raise at least $50,000 by auctioning(拍賣) off the rights to name the 4-inch “owl eye” butterfly, which lives in Sonora, a Mexican state bordering Arizona.

“That would support at least two years of research for our team down in Mexico,” Warren said. “Money goes a long way down here in Mexico.”

According to the scientific tradition, discoverers of a new species have the say in naming it. In recent years, some discoverers have auctioned off their naming rights to raise money.

Warren said the amount being sought for the butterfly is not out of the question, noting that naming rights for a new monkey species brought in $650,000 two years ago. A group of 10 new fish species that went on the naming auction block at the same time earlier this year brought in a total of $2 million.

The butterfly discovered by Warren and researcher George Austin ranges as far north as Mexico.

The butterfly was actually in a collection, misidentified as an example of another new species, at the McGuire Center for Lepidoptera and Biodiversity at the Florida Museum of National History in Gainesville, said Warren. They soon began the hard process of determining that it was indeed a “new” model of butterfly.

After checking photos and comparing it with other known species, they determined it was a separate species.

1.Where did the researchers discover the new species of butterflies?

A．In Sonora.

B．In Mexico state.

C．In a place in US.

D．Near the US-Mexico border.

2. Why will the researchers sell the naming rights of the butterfly?

A．To raise money for wildlife protection.

B．To raise money for more research.

C．To cause people’s attention to the new discovery.

D．To cover the cost of the research.

3.When the butterfly was first discovered, people thought ______.

A．it was a new species at once

B．it wasn’t a species of American butterfly

C．it belonged to the monarch branches

D．it belonged to a new species

4. We can infer from the passage that ______.

A．the new species of butterfly live both in the US and Mexico

B．it took the researchers a lot of efforts to determine the new species of butterfly

C．the researchers are not sure whether they can get the money they want from the auction

D．it is the first time that the new species of butterfly has been found

 

查看答案和解析>>

同步練習(xí)冊(cè)答案