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下列化合物酸性最强的是?

A. 丙二酸
B. 醋酸
C. 草酸
D. 苯酚

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1、Part III Vocabulary and StructureDirections:There are 20 incomplete sentences in this part. For each sentence there are four choices marked A), B), C) and D). Choose the ONE answer that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.1. The cotton plant manufactures fluffy pods and the fluffy pods contain long and short fibers __ each seed.A) attached toB) related withC) preserved inD) acted on2. Professor Smith, many students want to see you. they wait here or outside?A) ShallB) WillC) DoD) Are3. I wanted to find out first was how long it would take to complete the bridge.A) ThatB) ThoseC) WhatD) Which4. Our suspicions were first when we heard some strange noises in the woods.A) raisedB) roseC) aroseD) aroused5. So in the afternoon, with nothing , I went on a round of the bookstores.A) to doB) doingC) doneD) to be done6. Jack is a school child who is what he wants from life and desperately needs someone to help him through the confusion.A) aware ofB) unconscious ofC) uncertain ofD) unwilling to know7. telling her again since she won't listen to it?A) What's the point ofB) How's the point ofC) Where's the point inD) Is there the point for8. Medical scientists expect it will be many years _ cancer is conquered.A) beforeB) whenC) sinceD) after9. It may rain; you'd better take an umbrella just .A) in caseB) in the caseC) in eventD) in the event10. A man who could __ such treatment was a man of remarkable physical courage and moral strength.A) bear onB) stand up toC) insist onD) persist in

Language is a way to communicate with each other. We started to learn language when we were born. However, people are used to speaking their native language, so immigrants are having many problems between the first generation and the second generation because they don't have the same native language. Also, the second generation is losing their identity. Especially in America, there are many immigrants that came from different countries to succeed in the States. Because they suffer in lots of areas such as getting a job and trying to speak English, they want their children to speak English, not only at school, but also at home in order to be more successful. Because of this situation, their children are losing their ethnic identity and, even more, they are ignoring their parents whose English is not very good.I think most immigrants are trying to preserve their native language in their new country, but this doesn't help very much in getting a good job. My aunt didn't teach Korean to her children in order to help them succeed in the US; she did so, hopefully, to help them establish a Korean identity. Though the second generation is born in the new country, they often get confused about their identity. My cousins told me that when they visited Korea a few years ago, they felt different from other Koreans. They could even feel it just strolling around the street because they wore different clothes.We must realize that language is important and valuable for many reasons. Immigrants should make an effort not to be ignored by their children and to make their children understand their heritage by teaching them the parents' language. This is important in helping the second generation establish their identity.26.Which people are having trouble with language?A. Natives.B. People of the 2nd generation.C. People when born.D. Immigrants.27.Why are children ignoring their parents?A. Children have lost their identity.B. Parents cause children to suffer.C. They speak different languages.D. They have different job levels.28.The author's aunt taught Korean .A. so she could preserve her languageB. so she would have a job in AmericaC. to help children succeed in their new countryD. to help children keep their Korean identity29.The author's cousins felt .A. they were not similar to people in KoreaB. they could not get a job in AmericaC. it was all right to look and feel differentD. it was important to keep their identity30.A proper title for this passage is .A. The Identity of the Second GenerationB. Korean Problems in AmericaC. Learning a New Language in the USD. Keeping Your Culture in a New Land

With the arrival of sound films and radio in the late 1920s, theater buildings were torn down or converted into film palaces. Soon the only theater that remained was provided by colleges and other amateur groups. It was not until the so-called cultural revolution swept the United States after World War II that a strong demand arose for resident professional theater. Then the demand led to action in almost every major city. With the help of the government and of such groups as the Ford and Rockefeller Foundations, regional theaters have been established on a non-profit basis to serve their communities as cultural not commercial institutions.Also active on the cultural scene are the arts councils of the fifty states. They provide funds and coordinate programs on the statewide level. On the local level, direct contributions to various art groups are made by many city governments.Professional plays are now being performed in such unusual places as a former nightclub in Boston, Massachusetts, or a wholesale meat-and-vegetable market in New Haven, Connecticut. But Broadway, off-Broadway, and regional theater, sometimes called resident theater, are still only part of the story of American theater today. There are touring companies taking Broadway shows to cities throughout the country. There are summer theaters — more than 300 now — where plays are performed, often in tents or barns.21. It can be inferred from the passage that in the 1930s, ___.A) there was no professional theatersB) theaters were all putting on filmsC) only college students had interest in theatersD) the government provided help to theaters22. Theaters revived in the U.S. _.A) in the World War IIB) after the World War IIC) as a result of the warD) because film industry was destroyed by the war23. Theaters at first were reestablished _.A) to place jobless peopleB) not for making moneyC) by the governmentD) to hold public activities24. The funds for the operating of the theaters do not come from _.A) the governmentB) the famous foundationsC) the arts councilsD) the public25. Regional theaters are also addressed as _____.A) summer theatersB) resident theatersC) professional theatersD) amateur theaters

Culture is the sum total of all the tradition, customs, beliefs, and ways of life of a given group of human being. In this sense, every group has a culture, however savage, undeveloped, or uncivilized it may seem to us.To the professional anthropologists, there is no intrinsic superiority of one culture over another, just as to the professional linguists there is no intrinsic hierarchy among languages.People once thought of the languages of backward groups as savage, undeveloped forms of speech, consisted largely of grunts and groans. While it is possible that language in general began as a series of grunts and groans, it is a fact established by the study of "backward" languages that no spoken tongue answers the description today. Most languages of uncivilized groups are, by our most severe standards, extremely complex, delicate, and ingenious pieces of machinery for the transfer of ideas. They fall behind our western language not in their sound patterns or grammatical structure, which usually are fully adequate for all language needs, but only in their vocabularies, which reflect the objects and activities known to their speakers. Even in this department, however, two things are to be noted: a) All languages seem to possess the machinery for vocabulary expansion, either by putting together words already in existence or by borrowing them from other languages and adapting them to their own system; b) The objects and activities requiring names and distinctions in "backward" languages, while different from ours, are often surprisingly numerous and complicated. A western language distinguished merely between two degrees of remoteness ("this" and "that"); some languages of the American Indians distinguish between what is close to the speaker, or to the person addressed, or removed from both, or out of sight, or in the past, or in the future.This study of language, in turn, casts a new light upon the claim of the anthropologists that all cultures are to be viewed independently, and without ideas of rank or hierarchy.16. The language of uncivilized groups as compared to western language is limited in _____.A) vocabulariesB) sound patternsC) grammatical structuresD) both A and B17. The statement that "every group has a culture" grows out of the author's _.A) philosophyB) definition of cultureC) feeling about human beingsD) bias in regard to civilized human18. According to the author, anthropologists would have all culture viewed _.A) comparativelyB) independentlyC) intrinsicallyD) hierarchically19. According to the author, language whether "civilized or not" has _____.A) the same way to transfer ideasB) the same grammatical structuresC) the potential for expanding vocabularyD) the potential for increasing sound patterns20. Which of the following is implied but not stated?A) The study of languages discredited the anthropological studies.B) The study of language is the same as the study of anthropology.C) The study of language casts a new light upon the claims of anthropologists.D) The study of language has reinforced anthropologists in their view that there is no hierarchy cultures.