题目
题型：不详难度：来源：
d．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, wh
ich 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.
小题1:What is the author’s attitude toward the cause of this disorder?
| A．Doubtful | B．Neutral | C．Supportive | D．Negative |
| A．presenting the effect and analyzing its causes |
| B．making comparisons between two countries |
| C．providing data and examples |
| D．following the time order |
| A．Three | B．Four | C．Five | D．Six |
| 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 |
答案
解析
核心考点
试题【US bees operation keeping groups have been attacked seriously by so called Colon】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
It is obvious that if students value highly their test scores, then a great amount of their self-respect is put in the number. Students who perform poorly in the exam are left feeling that it is all over.The low test score, they think, will make it impossible for them to get into a good college. And without a degree from a prestigious university, they fear that many of life’s doors will remain forever closed.
According to a study done in the 1990s, the SAT is only a reliable indicator of a student’s future performance in most cases. Interestingly, it becomes much more accurate when it is set together with other indicators--like a student’s academic proficiency(学业水平).They will never be able to test things like confidence, efforts and willpower, and are unable to give us the full picture of a student’s potentialities. This is not to suggest that we should stop using SAT scores in our college admission process. The SAT is an excellent test in many ways, and the score is still a useful means of testing students. However, it should be only one of the many methods used.
小题1: The purpose of the SAT is to test students’ _________.
| A．strong will |
| B．academic ability |
| C．full potentialities |
| D．confidence in school work |
| A．scores in the SAT |
| B．achievements in mathematics |
| C．job opportunities |
| D．money spent on education |
| A．a famous school |
| B．a technical school |
| C．a traditional school |
| D．an expensive school |
| A．how to prepare for the SAT |
| B．stress caused by the SAT |
| C．American higher education |
| D．the SAT and its effects |
| A．Subjective |
| B．Objective |
| C．Critical |
| D．Approving |
Students stand at attention with their right hand over their heart, face the flag which is displayed in the classroom before them and begin, “I pledge allegiance to the flag of the United States of America.” Even the immigrants who come from distant lands must recite this pledge to the flag when they become eligible for citizenship.
The American flag is also known as “Old Glory” and over the years has evolved to its present form of fifty stars and thirteen stripes. The stars represent the fifty states and the stripes stand for the original thirteen colonies.
The first version of the flag with its stars and stripes appeared in 1777, but only had thirteen stars. As each new state joined the union, a new star was added. The last star to be added was in 1960 after Hawaii became the fiftieth state. In the future if another state joins the Union, another star will be added to the field of blue. The number of stripes, however, remains consistent and never changes.
The design of the flag may have altered over the years, but the colors, red, white and blue, have remained constant. In 1782 the Congress of the United States proclaimed that red stood for hardiness and courage, white stood for purity and innocence, and blue for justice and perseverance.
It was the flag which inspired the creation of the national anthem: “The Star Spangled Banner” in 1812. President Wilson in 1916 and later President Coolidge in 1927 suggested in proclamations to fellow countrymen that a special day be set aside to honor the flag. In 1949 the American Congress gave official recognition of June 14 as Flag Day.
小题1:According to the passage which of the following statements is NOT true?
| A．The Pledge of Allegiance was written in 1892. |
| B．Another name of the American flag is “Old Glory” or “The Stars and Stripes”. |
| C．The design of the flag has stayed the same over the years. |
| D．June 14 was set aside as Flag Day to honor the flag from 1949 on. |
| A．It opens the school day. | B．It is recited in all schools. |
| C．It is a sign of unity and nationalism. | D．It makes someone eligible for citizenship. |
| A．Purity and innocence. | B．Truth and honesty |
| C．Bravery and courage | D．The fifty states. |
| A．have changed from time to time. | B．have always been red, white and blue. |
| C．used to be only red and white. | D．used to be red and blue. |
| A．“Old Glory”: the American Flag | B．The Pledge of Allegiance |
| C．American National Anthem | D．Flag Day |
During summer nights fireflies flash in the darkness. They look like bright spots of light dancing on the breeze. Catching them in a jar for a few minutes can be fun. Fireflies are not really flies, though. They are winged beetles. Scientists are using these special beetles to learn more about our world.
The reason a firefly flashed its light is to find a mate. There are around two thousand species, or kinds, of fireflies. Fireflies mate only with their own species. Each kind of firefly has its own flash pattern. It is important that fireflies recognize this pattern. That way they can find bugs of their own kind. The male firefly flies around in the sky while the female firefly stays close to the ground.
For many years, how a firefly flashes its light was a mystery. Scientists now know that a firefly’s light is a cold light. It gives off all of its power as light. It does not produce heat. A normal light bulb gives off only ten percent of its power as light. The rest of the power is wasted as heat. That is why a light bulb that has been on for a while is very hot. The firefly’s light does not feel hot like a light bulb.
Scientists have also learned that fireflies have a small built-in lantern. This special lantern is located inside a firefly’s body. To create light, a gas flows through tiny tubes. This causes the firefly to light up. A firefly can also turn its light on and off quickly. This puzzled scientists. They learned that short bursts of this gas make the firefly glow. When the gas fades, the light goes out. This process happens very quickly.
Scientists know that what they learn from fireflies will be important. Medical studies using fireflies are helping scientists fight illnesses in human beings. They have made new medicines from the chemicals used by fireflies to make light. Fireflies have also helped with new discoveries. New flashlights and flares have been made based on fireflies. These new flashlights and flares produce a cold light like a firefly. This way all the power makes the light shine. This little bug may be a pleasure to watch, but it is also an important part of our lives.
小题1:Why did the author most likely include Paragraph 4?
| A．To explain how fireflies make light. | B．To describe different kinds of fireflies. |
| C．To show how much power fireflies use. | D．To describe why fireflies make light. |
| A．The Cool Light of Fireflies | B．Watching Fireflies Flash |
| C．Understanding the Patterns | D．Learning from Fireflies |
| A．shines brighter | B．does not fade | C．lasts longer | D．is not hot |
| A．Paragraph 2 | B．Paragraph 3 | C．Paragraph 4 | D．Paragraph 5 |
| A．tell why fireflies light up | B．give facts about fireflies |
| C．show how fireflies help doctors | D．compare a firefly to a light bulb |
As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. They become interested in the physical world around them: the plants, the animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.
Scientists spend their lives trying to find out about the world. Those who work with the earth sciences study the earth, the oceans, and the skies. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry .
These scientists have already discovered a lot about our world. For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.
Of course, scientists cannot answ
er all of our questions. If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.We know a lot about our world, but there are still many answers that we do not have, and we are curious.
小题1:According to the passage, which of the following statements is true?
| A．People are curious in the same way. |
| B．People in different countries are interested in different things. |
| C．Men and women are curious about different things. |
| D．People of different ages are interested in different things |
| A．the earth , the oceans and the sky | B．man-made things |
| C．plants and animals | D．ocean water |
| A．more nutrition and oxygen | B．more signals |
| C．more salt | D．water |
| A．in wet regions | B．in dry regions |
| C．at very high or very low temperatures | D．when salty water falls in |
| A．they cannot explain many things | B．they know nothing about the world |
| C．they know little about the world | D．they want to be scientists |
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.
小题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 |
| 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. |
| A．confused | B．absorbed |
| C．dangerous | D．excited |
| 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. |
| A．advise 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 |
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