型号为Y112M4的国产电动机，已知其在额定运行条件下的转差率为0.05，则此电动机的额定转速为（）r/m

o imply that ______.

A．the country will face mounting problems of the old in future

B．the social welfare system would be under great pressure

C．young people should be given more moral education

D．the old should be provided with means of livelihood

o imply that _____.

A．the country will face mounting problems of the old in future

B．the social welfare system would be under great pressure

C．young people should be given more moral education

D．the old should be provided with means of livelihood

o imply that

A．the country will face mounting problems of the old in future.

B．the social welfare system would be under great pressure.

C．young people should be given more moral education.

D．the old should be provided with means of livelihood.

o imply that ______.

A．the country will face mounting problems of the old in future.

B．the social welfare system would be under great pressure.

C．young people should be given more moral education.

D．the old should be provided with means of livelihoo

o imply that ______.

A．the country will face mounting problems of the old in future

B．the social welfare system would be under great pressure

C．young people should be given more moral education

D．the old should be provided with means of livelihood

at does the author seem to imply？

A．Wyoming will face the problem of a labour shortage.

B．The social welfare system would be under great pressure.

C．Young people should be given more moral education.

D．The old should be provided with means of livelihood

at does the author seem to imply？

A．Wyoming will face the problem of a labour shortage.

B．The social welfare system would be under great pressure.

C．Young people should be given more moral education.

D．The old should be provided with means of livelihood

at does the author seem to imply？

A．Wyoming will face the problem of a labour shortage.

B．The social welfare system would be under great pressure.

C．Young people should be given more moral education.

D．The old should be provided with means of livelihood

ch as agreeing not to get drunk(23 percent of women compared to 14 percent of men). About twice many women as men reported agreements with friends not to【M1】______ have dangerous relationships with someone new during break(17 percent compared to 8 percent). "Students went on a spring break trip were nearly four times as【M2】______ likely as other students to engage to binge drinking," said【M3】______ developmental psychologist Megan Patrick, lead author of the paper and a Faculty Research Fellow at the University of Michigan Institute for Social Research. " Understandings students had with their friends were also important predictors of alcoholic use."【M4】______ Patrick and colleagues at Penn State surveyed 651 college freshmen either before and after spring break. They were able to【M5】______ control for student behavior. after spring break, which was【M6】______ a strong predictor of behavior. during break. According to the study, about 31 percent of 651 college freshmen surveying reported binge drinking during spring break.【M7】______ "Its important to encourage young people to talk with their friends being safe during spring break," Patrick said. " Agreeing that【M8】______ they wont drink too much may have an important protected effect.【M9】______ Its also important to talk about looking out for each other in case of【M10】______ someone does drink too much."

【M1】

he world by and large. It is spoken frequently specially in【M1】______ developed countries. This is an inescapable process of globalization. However, according to many experts in linguistics, English is dominating todays modern world and thus, disregard most minority languages.【M2】______ Therefore, it is essential to consider the history of how English gradually becomes dominant down to the present time.【M3】______ The key to English globalization and extension up to the current is basically due to the three eras where English had undergone in the past.【M4】______ English benefited from three overlapping eras of world history. The first era was the imperial expansion of European powers which spread the use of English so well as of other languages, like Spanish, French and Portuguese【M5】______ around the world. The second is the era of technological revolution, begun【M6】______ with the industrial revolution which the English-speaking nations of Britain【M7】______ and United States made a leading part, and the later electronic revolution,【M8】______ led above all by the USA. The third is the era of globalization. The mentioned three eras are pertinent to one another, for example the second era, namely as the electronic revolution has introduced the Internet【M9】______ technology including e-mail, e-commerce, e-business and other e-activities which support the third era, the globalization era likely to take place.【M10】______ Further development of the globalization era leads to the commonness of English in several fields such as science, technology and world trade.

【M1】