US bees operation keeping groups have been attacked seriously by so called Colony Collapse Disorder (蜂群衰竭失調(diào))．Almost 1/2 of their worker bees have vanished during the past season．This disorder has also been reported in Israel, Europe and South America．Bees fly away from the hive and never return．Sometimes they are found dead; other times they are never found．Many crops and trees depend on pollination--- by bees to help them grow． 
A new report says a virus may be at least partly responsible for the disorder in honey bee colonies in the United States．This virus is called Israeli acute paralysis virus．It was first found in Israel in 2004．Lan Lipkin at Columbia University in New York and a team reported the new findings in Science Magazine．Doctor Lipkin says the virus may not be the only cause．He says it may work with other causes to produce the collapse disorder．
The team found the virus in colonies with the help of a map of honey bee genes that was published last year．They examined thirty colonies affected by the disorder．They found evidence of the virus in twenty-five of them, and in one healthy colony．The next step is further testing of healthy hives．
The researchers suggested that the United States may have imported the disorder in bees from Australia．They say the bees may carry the virus but not be affected．
The idea is that unlike many American bees, the ability of Australian bees to fight disease has not been hurt by the varroasis mite．This insect attacks honey bees, which could make the disorder more likely to affect a hive．Australian bee producers object to these suspicions．
And some researchers suspect that bee production in the United States is down mainly because of the weather．Honey bees gather nectar from flowers and trees．The sweet liquid gives them food and material to make honey．But cold weather this spring in the Midwest reduced the flow of nectar in many flowers．Many bees may have starved．Dry weather in areas of the country could also be playing apart．
Wayne Esaias is a NASA space agency scientist who keeps bees in his free time．He lives in central Maryland, where he has found that flowers are blooming a month earlier than they did in 1970, which may be partly responsible for the disorder. Wayne Esaias is organizing a group of beekeepers to document nectar flow around the country.
小題1:What is the author’s attitude toward the cause of this disorder?
A．DoubtfulB．NeutralC．SupportiveD．Negative
小題2:The passage is mainly developed by            .
A．presenting the effect and analyzing its causes
B．making comparisons between two countries
C．providing data and examples
D．following the time order
小題3:How many possibilities may be involved in the bee disorder according to the passage?
A．ThreeB．FourC．FiveD．Six
小題4:From the passage we can infer that           .
A．American bees are more likely to defend themselves against hurt from other insects than Australian ones
B．A collection of plants production in the U.S may be influenced by the bee disorder
C．Israeli acute paralysis virus should be responsible for the disorder
D．The solution to the disorder will be found eventually
小題1:B小題1:A小題1:A小題1:B
略
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：不詳 題型：閱讀理解

Speaking in his first National Day Rally speech on 15 August, Prime Minister Lee Hsien said Singapore’s education system was set for more reforms in the years ahead, particularly for the primary and secondary education．Read the summary of his thoughts on education below．
For a start, the Government is prepared to send and additional 3,000 teachers to Singapore schools, cut the courses of study even further and change the way the mother tongue, especially Chinese, is taught．But, for the changes to be successful, parents need to help．
Singapore has a devoted group of teachers and principals and quite a few of them are outstanding, but the Republic’s schools can be even better．To help the schools make a jump in quality, the Government plans that within the next 6 years, it will send 1,000 more teachers to primary schools, 1,400 to secondary schools and 550 more to junior colleges．Each school would decide how to use its extra teachers．Some may want to make classes smaller so students get more individual attentions while others may have new teachers assist more senior teachers, but the overall goal is to give teachers the time and space to come up with ways to bring out the best in their students．
More teachers must not mean more homework, however．In fact, the Prime Minister wants to see the courses cut down so that there is less pressure on the students．Good grades are important but they should not be the only goal students have．PM Lee is convinced that “we must teach less so that our children can learn more．”
Another change will be in the teaching of the mother tongue so that students can become more fluent．The key is to teach Chinese as a living language not just an academic subject like Latin．Therefore, the focus should be on speaking and reading the language．To do this, there must be an environment outside the classroom that is contributing to strengthening the Chinese lessons．
小題1:The text is mainly about         in Singapore．
A．the education reformB．a(chǎn)dding more teachers
C．the mother tongueD．ways of teaching
小題2:The general goal of using extra teachers is to          ．
A．make classes smallerB．a(chǎn)ssist more senior teachers
C．teach moreD．help teachers improve teaching quality
小題3:PM Lee holds that the students should         ．
A．do more homework B．give up higher grades
C．study more coursesD．be given more time to learn more
小題4:The key to teaching Chinese well is to          ．
A．make it academicB．have a creative environment
C．give more Chinese lessonsD．encourage speaking and reading a lot

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Ants have a reputation for strength,organization and teamwork.But researchers have now discovered that a key secret to the success of ants is their ability to identify the importance of age in the work place.
A study of Gentral American leaf-cutter ants has shown that the younger and stronger members are give the toughest job of cutting therough the leaves they harvest.Their sharp youn teeth do this job effectively,but as they get older their teeth become relatively worn and blunt.
But rather than being retired or abandoned by the group,the ageing ants are given a new role more suyted to their physical abilities.They become carriers and teansport the leaves back to the kingdom where they are harvested for food.
The findings by researchers from the University of Oregon and the Oregong State University support previous research showin the survival of a leaf-cutter kingdom depends on the efficiency(效率）of is workers.
“Cuting leaves is hard work,”said Dr.Robert Schofield,who led the research team.“Much of the cutting is done with a V-shaped blade(刀片）between teeth on their jaws.This blade starts out as sharp as the sharpest razor blade that humans have developed.”But over rime the teeth become blunter and the cutting job slows down.The team estimated that,because of this age-related wear,a colony(蟻群)spent twice the energy cutting leaves than it would if all the ants had sharp blades.Its findings support the idea that wear and break can be significant problems for insects as well as largre animals.
Like humans,leaf-cuttre ant recognize that older members of the group can still make a worhwhile contribution to society.“This study shows an advantage of social living that we are familiar with,”said Dr.Schofield.
小題1:The younger and stronger ants do the toughest job because      .
A．they can teansport the leaves effectively
B．they have a sharp blade to cut leaves
C．other members are busy with other work
D．they can finish the job in a better organized way
小題2:The undrelined word“blunt”in the second paragraph can be replaced by      .
A．quite looseB．less sharp
C．quite fragileD．more dirty
小題3:What happens to the ants when they become old?
A．They no longer hve work to do.
B．They keep doing the same work.
C．They have to leave and live on themselves.
D．They are given a new worthwhile job.
小題4:It can be learned from the passage that       .
A．Dr.Schofield is the first to research leaf-cuttre ants
B．older ants are more powerful in carrying leaves
C．large animals can also suffer from some kind of wear
D．leaf-cutter ants are the most lever ants in the world
小題5:What can be the best title for the passage?
A．The key secret to the success of ants
B．The developed structure of ant colony
C．The most challenging job for leaf-cutter ants
D．No V-shaped blade,no success of ants

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Scientists have found what look like caves on Mars, and say they could be protecting life from the planet’s terrible environment.
The first caves appear as seven mysterious black dots （點(diǎn)） on the pictures which were sent back by NASA’s Mars Odyssey orbiter. Each as large as a football field, they may be openings into natural caves below the Martian surface.
“If there is life on Mars, there is a good chance that you’d find it in caves,” said Jut Wynne, one of the researchers who noticed the features (特征) while working on a US Geological Survey Mars Cave Detection Program.
Jonathan Clarke, a geologist with the Mars Society of Australia, yesterday described the discovery as exciting.
One photo taken at night by an infrared imager(紅外線成像器) showed one hole to be unusually warm, suggesting hot air may be flowing out.
“I said: ‘Wow, that’s a cave’” Dr. Clarke said excitedly. “People have been looking for these for a long time; now we have found them.”
He agreed such caves could be perfect places to search for life escaping from the bitterly cold, radiation-soaked(充滿輻射的), dry surface.
“Tiny drops of water could collect inside,” he said. “If there are gases coming out, they could provide energy for a whole range of bacteria (細(xì)菌). A cave is also a protection from radiation; the surface of Mars is exposed to high levels of space radiation.”
The caves probably formed when tube-shaped lava flows(管狀巖漿流) spread across the planet long ago. The outside of the tubes cooled, forming solid walls, while something hotter inside allowed the remaining to flow out, forming caves.
小題1: What does the passage mainly talk about?
A．How the caves were formed on Mars.
B．How NASA sent the pictures back to earth
C．Caves on Mars may be full of hot air or a sign（跡象）of life.
D．Scientists have completely recognized the surface of Mars.
小題2: We can learn from the passage that __________.
A．water has already been found on Mars
B．the scientists found all the caves at night
C．it is certain that there is life in these caves
D．the surface of Mars is bitterly cold, radiation-soaked and dry
小題3: According to the passage, Dr. Clarke was so excited because ________.
A．such caves could provide energy for life
B．they had finally found the caves on Mars
C．such caves would be perfect places to search for life
D．There would be life on Mars.
小題4: Necessary conditions for life on Mars mentioned in the passage may include_________.
A．lava and energyB．water and radiation from space
C．gases and lavaD．water and protection from radiation
小題5: what does the underlined word “ the planet” in paragraph 1 refer to?
A．the MarsB．the earthC．the cavesD．radiation

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

“There is an out – of – date idea that children grow up and leave home when they’re 18,and the truth is far from that,” says Mr．Larry Bumpass of the University of Wisconsin．Today unexpected numbers of young adults are living with their parents．“There is a great change in the middle class,” declares Allan Schnaiberg of Northwestern University, whose son, 19, moved back in after an absence of eight months．
Scientists show a number of reasons for this return to the nest．The marriage age is rising, a condition that makes home and its pleasantness particularly attractive to young people．A high divorce （離婚） rate and a low remarriage rate make some differences．For some, the expense of an away - from - home college education has become so great that many students now attend local schools．Even after graduation, young people find their wings tied by terrible housing costs．
Living at home, says Knighton, a school teacher, continues to give security （安全保衛(wèi)） and moral（道義的） support．Her mother agreed．“Its strange for the kids to pay all that money for rent．It makes sense for kids to stay at home．” But sharing the family home requires changes for all．There are the hassles over bathrooms, telephones and privacy．Some families, however, manage the careful balancing act．But for others, it proves too difficult．Michelle Del Turco, 24, has been home three times and left three times．“What I considered a social drink, my dad considered an alcohol （酒精） problem,” she explains．“He never liked anyone I dated, so I either had to hide away or meet them at friends' houses．”
Just how long should adult children live with their parents before moving on? Most scientists feel lengthy homecomings are a mistake．Children, can end up with a sense of defeat and failure．And aging parents, who should be enjoying some freedom, find themselves stuck with too many things．Many agree that brief visits, however, can work well．
小題1:According to the author, there was once a trend in the U．S．________．
A．for young adults to leave their parents and live separately
B．for middle class young adults to stay with their parents
C．for married young adults to move back home after a lengthy absence
D．for young adults to get jobs nearby in order to live with their parents
小題2:Which of the following does not lead to young adults returning to the nest?
A．Young adults find housing costs too high．
B．Young adults are not old enough．
C．Young adults look for parental comfort and support．
D．Quite a number of young adults attend local schools．
小題3:The underlined word “hassles” in the passage probably means _________．
A．a(chǎn)greements B．worries
C．disadvantages D．quarrels
小題4:According to the passage what is the best for both parents and children?
A．They should share the family expenses．
B．Children should leave their parents when they are grown up．
C．Adult children should live away from their parents and visit their parents from time to time．
D．Parents should support their adult children when they are in trouble．
小題5:．One of the disadvantages of young adults returning to slay with their parents is that ______．
A．there will certainly be inconveniences in even-day life
B．most parents find it difficult to keep a bigger family going
C．the young adults try to be overprotected by their parents
D．public opinion is against young adults staying with their parents

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

More parents are looking to cellphones to help keep their children safe.  But mom and dad should be careful: Kids who talk on a cellphone may be more likely to step into traffic. Children should learn to end phone conversations before they prepare to step into traffic.
While research shows that older kids and more experienced users also don’t navigate(穿行于) streets as well while on a cellphone, younger children tends to find the small tools more distracting(令人分心的).
“Kids of this age are just learning to cross the street on their own, ”says David-Schwebel, a co-author of the study. “They’re beginners. ”
Kids don’t need to be stopped from chatting on the phone when outside,
however. Instead, parents simply should instruct them to finish their conversations before crossing the street.        
“I don’t think this means parents should take phones away from their kids, ”says Schwebel. “I encourage families to get cellphones for their children.  They’re more helpful than harmful,  if they’re used in a safe way. ”
Other distractions, such as conversations with friends, listening to music,  and text messaging, may also cause problems for children in this age group.  The researchers expect to study the effect of those types of distractions in the future.
Experts in child safety approved the cellphone study. “If you’re talking on a cellphone,  you’re not paying much attention to the environment around you, ” says Susan Baker, a professor.
Brooke Carlson, a 44-year-old mom, has noticed how riveted her 9-year-old son is when he’s talking on the cellphone. Although she’d never thought of the dangers of crossing traffic while on the phone, Carlson says, “Now that I know about it, it makes total sense. ”She plans to have a chat with her child about cellphones and street safety.
For younger kids, parents might consider purchasing a phone with a plan that only allows the child to call up his or her parents. That way the cellphone can be used for emergencies, but not for chatting with friends for hours.
小題1:In Schwebel’s opinion, _____ .
A．kids are still too young to walk on the street alone
B．kids don’t know how to use cellphones appropriately
C．kids have little experience in crossing the street alone
D．kids are not experienced cellphone users
小題2: Which of the following is Schwebel in favor of?
A．Children shouldn’t be allowed to have a cellphone.
B．Children should be forbidden to chat on the phone when outside.
C．Cellphones do more harm to children than other distractions.
D．Parents should teach kids about cellphones and street safety.
小題3: The underlined word “riveted” may mean“_____”.
A．confusedB．a(chǎn)bsorbed
C．dangerousD．excited
小題4: According to the passage, what does Mrs Carlson know?
A．There are dangers of crossing streets while on the phone.
B．Her 9-year-old son is not interested in talking on the phone.
C．Cellphones are more helpful than harmful to children.
D．Kids don’t pay attention to the environment when talking on the phone.
小題5: The purpose of writing this passage is to _____.
A．a(chǎn)dvise parents not to buy cellphones for children
B．introduce a phone that only allows kids to call up parents
C．expect kids not to talk on cellphones while on the street
D．expect people to use cellphones less in daily life

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

For several years, scientists have been testing a substance called interferon(干擾素), a possible wonder drug that is proving to be effective in treating a variety of diseases, including virus infections, bacterial infections, and cancers. To date, the new drug has no side effect of great influence to discourage its use.  But in spite of its success, last year only one gram was produced in the entire world.
The reason for the shortage lies in the structure of interferon. A special protein, the interferon produced from one animal species cannot be used in treating another animal species. In other words, to treat human beings, only interferon produced by human beings may be used. The drug is produced by infecting white blood cells with a virus. Fortunately, it is so effective that the amount given to each patient each time is very small.
Unlike antibiotics (抗生素), interferon does not attack germs directly. Instead, it protects healthy cells from being infected, and prevents the reproduction of viruses within cells.
As you might conclude, one of the most special uses of interferon has been in the treatment of cancer. Dr. Hans Strander, a research physician at Sweden’s famous Karolinska Institute, has treated more than one hundred cancer patients with the new drug. Among a group of selected patients who had received operations for advanced cancer, half were given  traditional treatments and the other half were given interferon. Among those treated with interferon 70 percent of them remained alive over three years, as compared with only 10 to 30 percent among those who had received the traditional treatments.
In the United States, a large-scale project supported by the American Cancer Society is now under way. If the experiment were successful, interferon could become one of the greatest medical discoveries of our time.
小題1:What is the difference between antibiotics and interferon?
A．Interferon has serious side effects, while antibiotics do not.
B．Antibiotics kill germs by attacking them directly, while interferon does not.
C．Antibiotics are very effective, while the effect of interferon is limited.
D．They are different in structure, although they are both proteins.
小題2:According to the passage, if 170 cancer patients received interferon treatment, how many of them would remain alive over three years?
A．About 30.
B．About 50.
C．About 120.
D．About 70.
小題3:The passage tells us that ________.
A．it is difficult to produce interferon in large quantities because of its special structure.
B．interferon is produced widely in lots of countries.
C．few of the patients who had received traditional treatments remained alive.
D．most of the patients who received interferon also needed traditional treatments.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Should parents ever hit their children?
Research suggests many of us are likely to respond “no”, and public support for spanking (打屁股) has been falling over the years. But surveys also show that 75 percent to nearly 90 percent of parents admit spanking their child at least once.
I was raised in a zero-tolerance( 零容忍) home for disrespect, and my parents often turned to physical punishment. And, no, I don’t feel I was damaged by it.
Nothing is more annoying than watching ill-mannered behavior from children.
But there is data to suggest that a return to old-school spanking isn’t the answer.
Two years ago , Newsweek reported that it had found data suggesting that teens whose parents used physical punishment were more likely to become aggressive(好斗的).
Murray Straus, professor at the University of New Hampshire in America, has studied the topic of children and spanking for decades. He said that children who were physically punished have lower IQs than their peers. It may be that children with lower IQs were more likely to get spanked, but the punishment may have been counterproductive (反作用) to their mental development, as well.
Some researchers make the argument that occasional open-handed smacks (用巴掌打) on the bottom are not only harmless but can have some benefit.
Last year, Marjorie Gunnoe, a psychologist at Calvin College, studied teens who have never been spanked. There are a greater number of children growing up without ever having been physically punished. Gunnoe’s research suggests they don’t turn out any better than those who were sometimes spanked.
There are some parents who simply cannot control their tempers. But I still believe that the best parents are the ones who are able to offer fair and firm discipline (管教) without ever turning to physical punishment.
小題1: What can we know from the research in the second paragraph?
A．Many of the parents made no response to the survey.
B．More and more people support spanking in public.
C．Most parents have the experience of spanking their children.
D．Many of the parents think they should hit their children.
小題2: According to Marjorie Gunnoe’s research, ________ .
A．the children who have never been spanked do better than those who were sometimes spanked
B．instead of harmless, spanking can have a little benefit
C．spanking has little effect on the children’s future performance
D．the teens who were often spanked are more likely to be aggressive
小題3: In the author’s opinion, the best parents are the ones ______.
A．who often use physical punishmentB．who never use physical punishment
C．who use physical punishment properlyD．who take physical punishment as useful tool
小題4:Which of the following is NOT TRUE according to the passage?
A．The author’s parents were strict with him when he was young.
B．The author thinks his parents’ spanking did no harm to him.
C．Murray Straus thinks spanking has nothing to do with children’s IQs.
D．Some parents spank their children because they can’t control their tempers.

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Researches show what we already suspected: Three out of four babies who died of SIDS(嬰兒猝死) involved co-sleeping. We’ll say it again. The safest course is not to sleep with babies.
We know the argument: Bad parenting, not co-sleeping, is to blame for the dozens of babies’ deaths. Some parents stick to co-sleeping because it helps them bond with their newborns. They say those who give co-sleeping a bad name either had been drinking, used drugs or were too tired to notice that they rolled over on their children.
But, most of the cases did not involve drugs or alcohol. There’s a “but” here, however. Submitting to a test for drugs or alcohol in these cases is voluntary, so it’s difficult to know with certainty.
Organizations like the Black Health Coalition and others have explained the safe way to co-sleep. While we understand those arguments, we also know that mistakes can happen and that it only takes one time for something to go terribly wrong. The risk outweighs the benefit.
In all likelihood, parents will continue to co-sleep, and some will do so without ever having an incident, but babies are too vulnerable(易受傷的) for parents to take such chances. Therefore, the best place for babies to sleep is in their own beds, on their backs, with no pillows, blankets or toys. No parent wants a tragedy(悲劇) to occur. The best way to make sure the tragedy doesn’t happen is to allow babies to sleep alone in their own cribs(搖籃).                                         
小題1:According to the author, most of the SIDS cases happened because of ________.
A．drugs
B．co-sleeping
C．drinking
D．bad parenting
小題2:Some parents think sleeping with their babies can ________.
A．keep the babies healthy
B．give co-sleeping a good name
C．prevent themselves from drinking
D．develop a good relation with their babies
小題3:The author holds the opinion that ________.
A．parents can sleep with babies, but cautiously
B．co-sleep helps to bring babies closer to parents
C．parents can’t take chances to sleep with their babies
D．a(chǎn)ccidents only happen to those careless parents
小題4:Which of the following best describes the structure of the text?
A．①B．①②C．①D．①
↙↘                                   ↓                  ↙↓↘              ↙↓↓↘
②③④                  ③④                 ②③④           ②③④⑤
↘↙                                  ↓                  ↘↓↙
⑤                            ⑤                  ⑤

查看答案和解析>>

同步練習(xí)冊(cè)答案