A photon having 40 keV scatters from a free electron at rest. What is the maximum energy that the electron can obtain？ （)

Visitors interested in hearing about the museum exhibitions in great detail should take a guided tour of the ______.

A．container

B．facility

C．amendment

D．approach

A. 100KB default, 10TB maximum

B. 256KB default, 1024MB maximum

C. 10MB default, 126PB maximum

D. 64KB default, 1EB maximum

E. 1MB default, 64MB maximum

They aim to ______ the maximum economic benefit from the Olympic Games.

A．contract

B．distract

C．extract

D．subtract

Contrary to the impression that grandmothers are delighted to help their grown daughters and care for their grandchildren, a study of multigenerational families indicates that many older women resent the frequent impositions of the younger generations on their home and energy.

"Young women with children are under a lot of pressure these days, and they expect their mothers to help them pick up the pieces", noted Dr. Bertram J. Choler, a behavioral scientist at the University of Chicago. "This is often the strongest source of resentment on the part of Grandmother, who has finished with child caring and now has her own life to live. Grandmothers like to see their children and grandchildren, but on their own time".

In all the four New England families studied, the older women resented the numerous phone calls and visits from their grown daughter, who often turned to their mothers for advice, physical resources, affection, and companionship as well as baby sitting services. "American society keeps piling on the burdens for older people, particularly those in their 50s and 60s", Dr. Choler said in an interview here. "They're still working and they're taking care of their grown children and maybe also their aged parents. Sometimes life gets to be too much. That's one reason many older folks move far away, to Florida or Arizona. They need more space and time to attend to their own affair and friends. Young people don't understand this, and that's part of what create tension between generations".

He has found that, contrary to what the younger generations may have thought, older people have an enormous amount to do. "More than half of working-class grandmothers still work, and if they're retired they have activities in the community that keep them occupied", he said. "Each generation has got to appreciate the unique needs of the other", Dr. Choler went on. "The younger generation has to realize that grandparents have busy, active lives and that they need privacy and more space for themselves. And the older generation has to realize that continuing to be part of the family is important to the younger generation and that they need help and support".

He noted that problems with interdependence between generations were likely to be more intense in working-class families than in middle and upper-class families. He explained that the working class tended to be geographically less mobile and to have fewer outside resources and that daughters were more likely to be reared with a strong family orientation and less emphasis on establishing an independent life.

What can be inferred from the sentence "Sometimes life gets to be too much" (Sentence 4, Paragraph 3)?

A．Older people enjoy their life very much.

B．To older people, sometimes life becomes very difficult.

C．There are so many things to do that the grandparents can't decide.

D．To older people, sometimes life is rewarding.

听力原文：M: As a means of international settlement, what is the main role of a credit card?

W: Its main role is to transfer the payment obligation from payer to bank. It makes the payment safer for the exporter with the bank' s credit and guarantee, and simultaneously makes the supply of goods safer for the importer.

Q: What is the main role of a letter of credit?

(19)

A．It is to transfer the contract from bank to customer.

B．It is to transfer the payment obligation from buyer to seller through banks.

C．It is to transfer the confirmation from the issuing bank to confirming bank.

D．It is to transfer the documents from advising bank to issuing bank.

A Document of Compliance differs from a Safety Management Certificate in that the former is issued to ______ by the Administration.

A.a ship

B.a company

C.a charterer

D.a manager

According to paragraph 4, what is the relationship between solar flares and the eleven- year sunspot cycle?

A．Solar flares are not related to the sunspot cycle.

B．There is more flare activity at the maximum end of the cycle.

C．There is more flare activity at the minimum end of the cycle.

D．The sunspot cycle indicates where on the sun the solar flares will occur.

According to paragraph 4, what is the relationship between solar flares and the eleven- year sunspot cycle?

A．Solar flares are not related to the sunspot cycle.

B．There is more flare activity at the maximum end of the cycle.

C．There is more flare activity at the minimum end of the cycle.

D．The sunspot cycle indicates where on the sun the solar flares will occur.

1 The way in which people use social space reflects their social relationships and their ethnic identity. Early immigrants to America from Europe brought with them a collective style. of living, which they retained until late in the 18th century. Historical records document a group-oriented existence, in which one room was used for eating, entertaining guests, and sleeping. People ate soups from a communal pot, shared drinking cups, and used a common pit toilet. With the development of ideas about individualism, people soon began to shift to the use of individual cups and plates; the eating of meals that included meat, bread, and vegetables served on separate plates; and the use of private toilets. They Began to build their houses with separate rooms to entertain guests — living rooms, separate bedrooms for sleeping, separate work areas — kitchen, laundry room, and separate bathrooms.

2 In Mexico, the meaning and organization of domestic space is strikingly different. Houses are organized around a patio, or courtyard. Rooms open onto the patio, where all kinds of domestic activities take place. Individuals do not have separate bedrooms. Children often sleep with parents, and brothers or sisters share a bed, emphasizing familial interdependence. Rooms in Mexican houses are locations for multiple activities that, in contrast, are rigidly separated in the United States.

Changes in living styles among early immigrants were initially brought about by

A．rising living standards.

B．new concepts.

C．new customs.

D．new designs of houses.