According to the writer, the most amazing thing about the e –nose is that it can ______.A. pick out ripe fruitsB. spot the insects quicklyC. distinguish different damages to the leavesD. recognize unhealthy tomato leaves
According to the writer, the most amazing thing about the e –nose is that it can ______.
A. pick out ripe fruits
B. spot the insects quickly
C. distinguish different damages to the leaves
D. recognize unhealthy tomato leaves
相关考题：
We can infer from the last paragraph that the e-nose_____.A. is unable to tell the smell of flowersB. is not yet used in greenhousesC. is designed by scientists at PurdueD. is helpful in killing harmful insects
190. Bullying (欺凌弱小) is a big problem that affects lots of kids. Three-quarters of all kids say they have been bullied or teased. Being bullied can make kids feel really bad. The stress of dealing with bullies can make kids feel sick. Bullying can make kids not want to play outside or go to school. It’s hard to keep your mind on schoolwork when you’re worried about how you’re going to deal with the bully near your locker. Bullying bothers everyone—and not just the kids who are getting picked on. Bullying can make school a place of fear and can lead to more violence and more stress for everyone. Some bullies are looking for attention. They might think bullying is a way to be popular or to get what they want. Most bullies are trying to make themselves feel more important. When they pick on someone else, it can make them feel big and powerful. Sometimes bullies know that what they are doing or saying hurts other people. But other bullies may not really know how hurtful their actions can be. Most bullies don’t understand or care about the feelings of others. Bullies often pick on someone they think they can have power over. They might pick on kids who get upset easily or who have trouble sticking up for themselves. Sometimes bullies pick on someone who is smarter than they are or different from them in some way. Sometimes bullies just pick on a kid for no reason at all. [共5题](1) According to paragraphs 1 and 2, which of the following is NOT TRUE?(A) Bullying makes kids frightened.(B) Bullying usually happens in school.(C) Bullying brings about more violence.(D) Bullying is not a serious problem.(2) Bullying happens because bullies ________.(A) want people to pay attention to them(B) feel they are unimportant(C) feel big and powerful(D) both A and C(3) We can infer from paragraph 4 that ________.(A) most bullies just care for themselves(B) most bullies don’t know they are hurting people(C) most bullies stop bullying when they know they are hurting people(D) most bullies conduct hurtful actions(4) Bullies usually pick on someone who is ________.(A) more powerful than themselves(B) weaker than themselves(C) totally different from themselves(D) as clever as themselves(5) The author writes the passage in order to ________.(A) describe bullying (B) argue about bullying(C) analyze bullying (D) narrate bullying
CPlants can’t communicate by moving or making sounds, as most animals do. Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas. A flower’s sweet smell, for example, comes from volatile compounds that the plant produces to attract insects such as bugs and bees.Plants can also detect volatile compounds produced by other plants. A tree under attack by hungry insects, for instance, may give off volatile compounds that let other trees know about the attack, In response, the other trees may send off chemicals to keep the bugs away- or even chemicals that attract the bugs’ natural enemies.Now scientists have created a quick way to understand what plants are saying: a chemical sensor(传感器) called an electronic nose. The “e-nose” can tell compounds that crop plants make when they’re attacked. Scientists say the e-nose could help quickly detest whether plants are being eaten by insects. But today the only way to detect such insects is to visually inspect individual plants. This is a challenging task for managers of greenhouses, enclosed gardens that can house thousands of plants.The research team worked with an e-nose that recognizes volatile compounds. Inside the device, 13 sensors chemically react with volatile compounds. Based on these interactions, the e-nose gives off electronic signals that the scientists analyze using computer software.To test the nose, the team presented it with healthy leaves from cucumber, pepper and tomato plants, all common greenhouse crops. Then the scientists collected samples of air around damaged leaves from each type of crop. These plants had been damaged by insects, or by scientists who made holes in the leaves with a hole punch (打孔器).The e-nose, it turns out, could identify healthy cucumber, pepper and tomato plants based on the volatile compounds they produce. It could also identify tomato leaves that had been damaged. But even more impressive, the device could tell which type of damage – by insects or with a hole punch – had been done to the tomato leaves.With some fine tuning, a device like the e-nose could one day be used in greenhouses to quickly spot harmful bugs, the researchers say. A device like this could also be used to identify fruits that are perfectly ripe and ready to pick and eat, says Natalia Dudareve, a biochemist at Purdue University in West Lafayette, Ind. who studies smells of flowers and plants. Hopefully, scientists believe, the device could bring large benefits to greenhouse managers in the near future.49. We learn from the text that plants communicate with each other by______.A. making some sounds B. waving their leavesC. producing some chemicals D. sending out electronic signals
What did the scientists do to find out if the e-nose worked?A. They presented it with all common crops..B. They fixed 13 sensors inside the device.C. They collected different damaged leaves.D. They made tests on damaged and healthy leaves.
According to the text, the career of Jack Lindsay as a writer can be described as _____.［A］inventive［B］productive［C］reflective［D］inductive
What will be the benefit if the research on smart windows turns out to be successful, according to the last paragraph?A．The buildings will look different.B．Windows can be as large as you want.C．We may not need air conditioners any more.D．They are less expensive than traditional windows.
According to the writer, what eventually brought about the disappearance of the park?A. The drought.B. The crime.C. The beggars and the rubbish.D. The decisions of the city.
Which of the following statements about the warm-blooded mammals is true according to the text?A. They can change their environments.B. They can adjust body heat to keep their ideal temperature.C. They can make food from chemicals.D. They get most of their heat from the environment.
Passage Two There are about 5,000 different kinds of ladybugs in the world. They come in many different colors. Their bright colors warn other animals or insects not to eat them. Ladybugs taste bad. A bird or a frog that eats a ladybug will remember the bright colors and it will not eat another ladybug with the same colors again. When ladybugs are in danger, they will give out a fluid (液体) that tastes terrible. In many cultures, the ladybug is considered to be a symbol of good luck. Most ladybugs are kind to humans. They eat other insects which destroy crops. One ladybug can eat up to 5,000 insets in its lifetime. Ladybugs have six short legs. They live in many different places, including green lands, forests, cities, the countryside and along rivers. Different ladybugs have different spots (点). Some of them don’t have spots at all. The most common kind in North America is the 7-spotted ladybug. The 7-spotted ladybugs are the most active from spring to autumn. When the weather turns cold, they look for a warm place to sleep, such as under stones or in houses.(1).Ladybugs can give out a terrible fluid to protect themselves.A.TB.F(2).In many cultures ladybugs are believed to bring good luck.A.TB.F(3).Most of the ladybugs are harmful to crops.A.TB.F(4).Ladybugs live in many places except cities.A.TB.F(5).Winter is the best time for 7-spotted ladybugs to go out for food.A.TB.F
According to the writer, the house in Westmoreland has the most loathsome color.() 此题为判断题(对，错)。
Idioms can be classified in different ways but the classification according to grammatical function is the most helpful way.()
For any Englishman there can never be any discussion as to who is the world's greatest writer. Only one name can possibly suggest itself to him：that of William Shakespeare.Every Englishman has some knowledge of his work. All of us use words and phrases from Shakespeare's writings that have become a part of the English-speaking people.Shakespeare, more perhaps than any other writer, made full use of the English language. Most of us use about five thousand words in our normal employment of English; Shakespeare in his works used about twenty-five thousand!There is probably no better way for a foreigner (or an Englishman!) to appreciate the richness and variety of the English language than by studying the various ways in which Shakespeare uses it. Such a study is well worth the effort (it is not, of course, recommended to beginners), even though some aspects of English usage, and the meaning of many words, have changed since Shakespeare's day.1). From the first two sentences of the passage we can conclude that ________.A. it can't be discussed about who is the world's greatest dramatistB. Shakespeare is regarded as the greatest writerC. Englishmen like to discuss about who is the world's greatest writerD. it can't be discussed about who is the world's greatest poet2). According to the passage many English words and phrases that we use today are from _____.A. EnglishmenB. English speaking peopleC. Shakespeare's worksD. ancient people3). To learn the richness of the English language, people should ______.A. write and read moreB. be glad to be a foreignerC. learn from an English manD. read Shakespeare's plays4). The author does not suggest beginners reading Shakespeare's plays probably because _____.A. only Englishmen can understand his playsB. some of English usage and the meaning of many words have changedC. the works are too difficult for a beginnerD. the works are for native speakers5). In this passage the author wants to _______.A. tell how great a writer Shakespeare isB. tell that some aspects of English usage have changed since Shakespeare's dayC. tell that some English words are out of use nowD. show the richness of English language
The writer suggests that pruning should be done in winter because______.A. the cut surface can heal more quicklyB. open wounds on the tree run the less risk of getting diseasedC. a gardener can do pruning more easilyD. the leaves can interfere
Different from other security software, Retriever can ______.A. record the stealing process B. help recognize the lost laptopC. lock down the computer remotely D. send a spoken message
资料：Faces, like fingerprints, are unique. Did you ever wonder how it possible for us to recognize people? Even a skilled writer probably could not describe all the features that make one face different from another. Yet a very young child or even an animal, such as a pingeon can learm to recognize faces. We all take this ability for granted.We also tell people apart by how they behave. When we talk about someone’s personality, we mean the ways in which he or she acts, speaks, thinks and feels that make that individual different from others.Like the human face human personality is very complex. But describing someone’s peronality in words is somewhat easier than describing his face. If you were asked to describe what a nice face looked like, you probably would have a difficult time doing so. But if you were asked to describe a nice person, you might begin to think about someone who was kind, considerate friendly, warm, and so forth.There are many words to describe how a person thinks, feels and acts. Gordon Allports, an American psychologist, found nearly18,000 English words characterizing differences in people’s behavior. And many of us use this information as a basis for describing or typing, his personality. Bookworms, conservatives, military types——people are described with such terms.People have always tried to type each other. Actors in early Greek drama wore masks to show the audience whether they played the villain’s or the hero’s role. In fact, the words person and persoality come from the Latin persona, meaning mask. Today, most television and movie actors do not wear masks. But we can easily tell the good guys from the bad guys because the two types differ in appearance as well as in actions.Which of the following is NOT true?A.People differ from each in appearanceB.Different people may have different personalitiesC.People can learn to recognize facesD.People can describe all the features of others
In order to（）the disease, the first thing we should do is to do research about it and find out a satisfactory cure.AconfirmBconductCcontrolDconfuse
Which two statements are true about the WebLogic Cluster ？（）A、 Clustered Servers capacity can be increased by adding new server instance to the cluster on an existing machineB、 Clustered Servers can be on a same or different machine with same operating system onlyC、 Clustered Servers can only be on a same machine or different operating systemD、 Clustered Servers can be on a same or different machine with same or different operating system
单选题According to the passage, the scientists carried out their researches on ______.Asmokers from different parts of the worldBsmokers from different states in the United StatesCactors and actresses who smoke a lotDwait staff and bartenders
单选题From the text we can conclude that ______.Athe writer is enthusiastically supporting the National LotteryBthe writer has objections to the National LotteryCthe writer believes that the lottery money should be used for cancer researchDthe writer is just expressing her feelings about collecting money for charity
单选题The passage is mainly about _____.Aliving thing on the moveBthe most famous migrationCmice in northern EuropeDmigrating of lobsters
单选题According to the author, the primary job of a critic is to ______.Arank established works in terms of their qualityBpoint out the flaws of long-established artists or worksCidentify historical antecedents to modern worksDinform listeners about the merits of new worksEsummarize the most popular opinions of new works
单选题According to the writer, which of the following is not true about your boss?AHe is the person who supervises you.BHe is the person setting the company’s goals.CHe can keep you informed of company direction concerned with your future.DHe can help you acquire support or cooperation from other departments.
单选题The colors red, blue, and yellow can be mixed in different combinations to make every color the human eye can distinguish.AsoakedBrankedCblendedDpurchased
单选题Which is said about The Flying Hat?AA movie about the story is coming out.BPeople can buy the book all over the world.CThe writer started the book because of a mistake.DThe story is about a boy with a magic book.
单选题What is most important for a diving instructor, according to Dave?AFinding a good spot to dive.BKnowing the local geographical conditions.CBeing patient with the trainees.
单选题According to the spokeswoman for a local court, what is the most important feature of a tomato in deciding a tomato-throwing offense?AColor.BHardness.CWeight.DQuality.