影响裂纹扩展的最主要参数是（）。

A．Because people want to get away from modern life.

B．Because people have more free time.

C．Because people like adventures.

D．Because people are not quite pleased with modem life.

A．the parents-child relationship is more exclusive in modern societies.

B．a child more often grows up with his/her brothers or sisters in traditional societies.

C．mother brings up children with the help of her husband in traditional societies.

D．children in modern societies are more likely to develop mental illness in later years.

Younger societies are disadvantageous compared with older ones in that

A．old people are more dependent than babies.

B．children are less active than the aged.

C．the inactive aged are more reliable than children.

D．Infants are more of a handicap than the elderly.

The difference between modem cell phones and old phones lies in that _____.

A．it requires more intelligence and education to use modern cell phones

B．it takes more weeks to get familiar with modern cell phones

C．modern cell phones are more complicated with many functions

D．modern cell phones are more mysterious tools for people

A．have to get familiar with modern technology

B．are gaining more economic benefits from domestic operations

C．are attaching more importance to their overseas business

D．are eager to work overseas

Modern means of (communicate) ______ can enable more people to work from home.

As a token in modern societies, money__________

A.is endowed with symbolic and religious meanings

B.is excluded in any non-industrial societies

C.plays a more important role than goods and services

D.fulfills its universal function as an exchanging medium

Modern scientific researches have reported to us that ______.

A．fat people eat less food and are less active

B．fat people eat more food than slim people and are more active

C．fat people eat more food than slim people but are less active

D．thin people run less, but have greater increase in food intake

As a token in modern societies, money__________

A. is endowed with symbolic and religious meanings

B. is excluded in any non-industrial societies

C. plays a more important role than goods and services

D. fulfills its universal function as an exchanging medium