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根据以下材料，回答Hair loss can be destructive for themillions of men and women who experience it. Now scientists are reporting thata substance from honeybee hives might contain clues for developing a potentialnew therapy. They found that the material, called propolis, encouraged hairgrowth in mice. The study appears in A CS′ Journal of Agricultural and FoodChemistry. Ken Kobayashi and colleagues note that propolis is a resin-likematerial that honeybees use to seal small gaps in their hives. Not only does itwork as a physical barrier, but it also contains active compounds that fightfungal and bacterial invasions. People from ancient times had noticed propolis′special properties and used it to treat tumors, inflammation and wounds. Morerecently, research has shown that the substance promotes the growth of certaincells involved in hair growth though no one had yet tested whether that in turnwould result in new locks. Kobayashi ′ s team wanted to find out.When the researchers tested propolis onmice that had been shaved or waxed, the mice that received the treatment regrewtheir fur faster than those that didn′t. The scientists also noticed that afterthe topical application, the number of special cells involved in the process ofgrowing hair increased. Although they tried the material on mice that couldgrow fur rather than balding mice, the researchers note that hair lossconditions often result from abnormal inflammation. Propolis contains anti-inflammatorycompounds, so they expert it could help treat balding conditions.They add that further testing is needed tosee if the beehive material affects human hair follicles.What′s the main idea of the passage?
A.It is about a test on mice.B.It is about an introduce of ACS'Journal.C.It is about a report on a study of newfunction of propolis.D.It is about a medicine that will be putinto market soon.

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根据以下材料，回答People do not analyze every problem theymeet. Sometimes they try to remember a solution from the last time they had asimilar problem. They often accept the opinions or ideas of other people. Othertimes they begin to act without thinking; they try to find a solution by trialand error. However, when all these methods fail, the person with a problem hasto start analyzing. There are six stages in analyzing a problem.First the person must recognize that thereis a problem. For example, Sam′s bicycle is broken, and he cannot ride it toclass as he usually does. Sam must see that there is a problem with hisbicycle.Next the thinker must define the problem.Before Sam can repair his bicycle, he must find out the reason why it does notwork. For instance, he must determine if the problem is with the gears, thebrakes, or the frame. He must make his problem more specific.Now the person must look for informationthat will make the problem clearer and lead to possible solutions. Forinstance, suppose Sam decided that his bike does not work because there is somethingwrong with the gear wheels. At this time, he can look in his bicycle repairbook and read about gears. He can talk to his friends at the bike shop. He canlook at his gears carefully.After studying the problem, the personshould have several suggestions for a possible solution. Take Sam as anillustration. His suggestions might be: put oil on the gear wheels; buy newgear wheels and replace the old ones; tighten or loosen the gear wheels.Eventually one suggestion seems to be the solution to the problem. Sometimesthe final idea comes very suddenly because the thinker suddenly sees somethingnew or sees something in a new way. Sam, for example, suddenly sees that thereis a piece of chewing gum between the gear wheels. He immediately realizes thesolution to his problem: he must clean the gear wheels.Finally the solution is tested. Sam cleansthe gear wheels and finds that afterwards his bicycle works perfectly. Inshort, he has solved the problem.What is the best title for thispassage?
A.Six Stages for Repairing Sam' s BicycleB.Possible Ways to Problem-SolvingC.Necessities of Problem AnalysisD.Suggestions for Analyzing a Problem

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根据以下材料，回答Hair loss can be destructive for themillions of men and women who experience it. Now scientists are reporting thata substance from honeybee hives might contain clues for developing a potentialnew therapy. They found that the material, called propolis, encouraged hairgrowth in mice. The study appears in A CS′ Journal of Agricultural and FoodChemistry. Ken Kobayashi and colleagues note that propolis is a resin-likematerial that honeybees use to seal small gaps in their hives. Not only does itwork as a physical barrier, but it also contains active compounds that fightfungal and bacterial invasions. People from ancient times had noticed propolis′special properties and used it to treat tumors, inflammation and wounds. Morerecently, research has shown that the substance promotes the growth of certaincells involved in hair growth though no one had yet tested whether that in turnwould result in new locks. Kobayashi ′ s team wanted to find out.When the researchers tested propolis onmice that had been shaved or waxed, the mice that received the treatment regrewtheir fur faster than those that didn′t. The scientists also noticed that afterthe topical application, the number of special cells involved in the process ofgrowing hair increased. Although they tried the material on mice that couldgrow fur rather than balding mice, the researchers note that hair lossconditions often result from abnormal inflammation. Propolis contains anti-inflammatorycompounds, so they expert it could help treat balding conditions.They add that further testing is needed tosee if the beehive material affects human hair follicles.Which of the following is wrong aboutpropolis?
A.It can battle fungal and bacterialinvasions.B.It promotes the growth of all cells.C.It can serve as a physical barrier.D.It can treat tumors, inflammation andwounds.

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根据以下材料，回答People do not analyze every problem theymeet. Sometimes they try to remember a solution from the last time they had asimilar problem. They often accept the opinions or ideas of other people. Othertimes they begin to act without thinking; they try to find a solution by trialand error. However, when all these methods fail, the person with a problem hasto start analyzing. There are six stages in analyzing a problem.First the person must recognize that thereis a problem. For example, Sam′s bicycle is broken, and he cannot ride it toclass as he usually does. Sam must see that there is a problem with hisbicycle.Next the thinker must define the problem.Before Sam can repair his bicycle, he must find out the reason why it does notwork. For instance, he must determine if the problem is with the gears, thebrakes, or the frame. He must make his problem more specific.Now the person must look for informationthat will make the problem clearer and lead to possible solutions. Forinstance, suppose Sam decided that his bike does not work because there is somethingwrong with the gear wheels. At this time, he can look in his bicycle repairbook and read about gears. He can talk to his friends at the bike shop. He canlook at his gears carefully.After studying the problem, the personshould have several suggestions for a possible solution. Take Sam as anillustration. His suggestions might be: put oil on the gear wheels; buy newgear wheels and replace the old ones; tighten or loosen the gear wheels.Eventually one suggestion seems to be the solution to the problem. Sometimesthe final idea comes very suddenly because the thinker suddenly sees somethingnew or sees something in a new way. Sam, for example, suddenly sees that thereis a piece of chewing gum between the gear wheels. He immediately realizes thesolution to his problem: he must clean the gear wheels.Finally the solution is tested. Sam cleansthe gear wheels and finds that afterwards his bicycle works perfectly. Inshort, he has solved the problem. The author intends to say that Samsolved his problem as a result of___________.
A.discovering something newB.using chewing gumC.looking at the bicycle in the new wayD.turning to others' help

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根据以下材料，回答People do not analyze every problem theymeet. Sometimes they try to remember a solution from the last time they had asimilar problem. They often accept the opinions or ideas of other people. Othertimes they begin to act without thinking; they try to find a solution by trialand error. However, when all these methods fail, the person with a problem hasto start analyzing. There are six stages in analyzing a problem.First the person must recognize that thereis a problem. For example, Sam′s bicycle is broken, and he cannot ride it toclass as he usually does. Sam must see that there is a problem with hisbicycle.Next the thinker must define the problem.Before Sam can repair his bicycle, he must find out the reason why it does notwork. For instance, he must determine if the problem is with the gears, thebrakes, or the frame. He must make his problem more specific.Now the person must look for informationthat will make the problem clearer and lead to possible solutions. Forinstance, suppose Sam decided that his bike does not work because there is somethingwrong with the gear wheels. At this time, he can look in his bicycle repairbook and read about gears. He can talk to his friends at the bike shop. He canlook at his gears carefully.After studying the problem, the personshould have several suggestions for a possible solution. Take Sam as anillustration. His suggestions might be: put oil on the gear wheels; buy newgear wheels and replace the old ones; tighten or loosen the gear wheels.Eventually one suggestion seems to be the solution to the problem. Sometimesthe final idea comes very suddenly because the thinker suddenly sees somethingnew or sees something in a new way. Sam, for example, suddenly sees that thereis a piece of chewing gum between the gear wheels. He immediately realizes thesolution to his problem: he must clean the gear wheels.Finally the solution is tested. Sam cleansthe gear wheels and finds that afterwards his bicycle works perfectly. Inshort, he has solved the problem.In analyzing a problem we should do allthe following EXCEPT ___________.
A.recognizing and defining the problemB.looking for information to make theproblem clearerC.having suggestions for a possiblesolutionD.finding a solution by trail or mistake

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根据以下材料，回答Using a computer or smartphone at nightcan cause us to 11 on the pounds, new research has revealed.The study found a link between blue light 12 --blue light is 13 by smartphones and tables--and increasedhunger. It found that exposure to the light increases hunger levels for severalhours and even increases hunger levels 14 eating a meal.Results of the US study show thatblue-enriched light exposure, compared with 15 light exposure, was 16 with an increase in hunger that began 15minutes after light onset and was still present almost two hours after themeal. Blue light exposure has also already been shown to decreased 17 in the evening, increasing the risk ofinsomnia.Study co-author Ivy Cheung, of NorthwesternUniversity in Chicago, said, "A single three-hour exposure toblue-enriched light in the evening 18 impacted hunger andglucose metabolism." "These results are important because theysuggest that 19 environmental light exposure for humansmay represent a novel 20 of influencing food intake patterns andmetabolism."The study group 21 10 healthy adults with regular sleep and eating schedules who received22 carbohydrate-rich meals. They completed afour-day trial 23 dim light conditions, which involvedexposure to less than 20 lux during 16 hours 24 and less than three lux duringeight hours of sleep. On day three they were exposed to three hours of 260 lux,blue-enriched light starting 10.5 hours after waking up, and the effects werecompared with dim light exposure on day two.Ms Cheung said more research is needed todetermine the 25 of action involved in the relationshipbetween light exposure, hunger and metabolism.
A.touch B.exposure C.contact D.approach

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