Her talk at the seminar clearly（ ）from the topic the supervisor expected in the field ofsociology.
A.alternated B.amplified C.designated D.diverged
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Beth never regretted （ ） to attend the party, for she did not like it at all.
A.not being invited B.being not invited C.having not been invited D.not having been invited
Farmland in parts of Japan is no longer safe because of high levels of radiation in the soil, scientists have warned, as the country struggles to recover from the Fukushima atomic disaster. A team of international researchers said food production would likely be "severely impaired" by the elevated levels of caesium （放射性铯）found in soil samples across eastern Fukushima in the wake of meltdowns at the tsunami-hit plant. The study suggests farming in neighboring areas may also suffer because of radiation, although levels discovered there were within legal limits. "Fukushima area as a whole is highly polluted,*' especially to the northwest of the nuclear power plant, the researchers said. The study looked at caesium-137, which has a half-life of 30 years and therefore affects the environment for decades.The legal limit for concentrations in soil where rice is grown of the sum of caesium-134 and caesium-137, which are always produced together, is 5,000 becquerels per kilogram in Japan. ‘The east Fukushima area exceeded this limit and some neighboring areas such as Miyagi, Tochigi and Ibaraki are partially close to the limit under our upper-bound estimate," the study said. "Estimated and observed pollution in the western parts of Japan were not as serious, even though some areas were likely affected to some extent," it added."Concentration in these areas are below 25 becquerels per kilogram, which is far below the threshold for farming. However, we strongly recommend each area to quickly carry out some supplementary soil samplings at city levels to validate our estimates."The study said ‘food production in eastern Fukushima area is likely severely impaired by the caesium-137 loads of more than 2,500 becquerels per kilogram’.The study was led by Teppei Yasu
In the past oysters were raised in much the same way as dirt farmers raised tomatoes—by transplanting them. First, farmers selected the oyster bed, cleared the bottom of old shells and other remains, and then scattered clean shells about. Next they “planted” fertilized oyster eggs, which within two or three weeks hatched into larvae. The larvae drifted until they attached themselves to the clean shells on the bottom. There they remained and in time grew into baby oysters called seed or spat (贝卵). The spat grew larger by drawing in seawater from which they derived microscopic particles of food. Before long, farmers gathered the baby oysters, transplanted them in other waters to speed up their growth, and then transplanted them once more into another body of water to fatten them up.Until recently the supply of wild oysters and those crudely farmed were more than enough to satisfy people's needs. But today the delicious seafood is no longer available in abundance. The problem has become so serious that some oyster beds have vanished entirely.Fortunately, as far back as the early 1900's marine biologists realized that if new measures were not taken, oysters would become extinct or at best a luxury food. So they set up well-quipped hatcheries and went to work. But they did not have the proper equipment or the skill to handle the eggs. They did not know when, what, and how to feed the larvae. And they knew little about the predators that attacked and ate baby oysters by the millions. They failed, but they doggedly (努力) kept at it. Finally, in the 1940's a significant breakthrough was made.The marine biologists discovered that by raising the temperature of the water, they could induce oysters to lay eggs not only in the summer but also in the fall, winter, and spring. Later they developed a technique for feeding the larvae and rearing them to spat. Going still further, they succeeded in breeding new strains that were resistant to diseases, grew faster and larger, and flourished in water of different salinities (盐分) and temperatures. In addition, the cultivated oysters tasted better!1.Which of the following would be the best title for the passage?2.At what stage of oysters did farmers begin to speed up their growth and fatten them up in the past?3.According to the passage, which of the following words best describes the efforts
Americans often say that there are only two things a person can be sure of in life: death and taxes. Americans do not have a comer on the “death” market, but many people feel that the United States leads the world with the most taxes.Taxes consist of the money which people pay to support their government. There are generally three levels of government in the United States: federal, state, and city: therefore, there are three types of taxes. Salaried people who earn more than a few thousand dollars must pay a certain percentage of their salaries to the federal government. The percentage varies from person to person. It depends on their salaries. The federal government has a graduated income tax, that is, the percentage of the tax increases as a person’s income increase. With the high cost of taxes, people are not very happy on April 15, when the federal taxes are due.The second tax is for the state government: New York，California，or any of the other forty-eight states. Some states have an income tax similar to that of the federal government. Of course, the percentage for the state tax is lower. Other states have a sales tax, which is a percentage charged to any item which you buy in that state. For example, a person might want to buy a packet of cigarettes for twenty-five cents. If there is a sales tax of eight percent in that state, then the cost of the cigarettes is twenty-seven cents. This figure includes the sales tax. Some states use income tax in addition to sales tax to raise their revenues. The state tax laws are diverse and confusing.The third tax is for the city. This tax comes in two forms: property tax (people who own a home have to pay taxes on it) and excise tax, which is charged on cars in a city. The cities use these funds for education, police and fire department, public works and municipal buildings.Since Americans pay such high taxes, they often feel that they are working one day each week just to pay their taxes. People always complain about taxe. They often protest that the government uses their tax dollars in the wrong way. They say that it spends too much on useless and impractical programs. Although Americans have different view on many issues, they tend to agree on one subject: taxes are too high.1.How do you understand “Americans do not have a comer on the death market”?2.What’s the attitude of the Americans towards taxes?3.What’s the difference between federal tax and state tax?4.Which of the following is NOT true according to the passage?5.Which of the following usages of the taxes is NOT mentioned in the passage
A.Americans can’t monopolize this market. B.There is no such place as a death market in the United States. C.Americans are not good at doing business in the death market. D.Americans do not have a secret place to keep from death in their life.
问题2：
A.Take them easy. B.Try to resist them. C.Complain and protest. D.Take them as their duty.
问题3：
A.They have the same percentage. B.It is not mentioned in the passage. C.The percentage for the state tax is higher than the federal tax. D.The percentage for the federal tax is higher than the state tax.
问题4：
A.Excise tax is charged on ears. B.There is a unified state tax laws. C.Income tax increases as a person’s income increases. D.Some states have both an income tax and a sales tax.
问题5：
A.For raising their revenues. B.For sustaining development. C.For police and fire departments. D.For public works and municipal building.
We cannot be（ ）with him due to his misbehavior at the meeting yesterday.
A.Pecked B.reconciled C.perturbed D.presumed