GRE-GMAT英语大全

Seeking a competitive advantage, some professional service firms(for example, firms providing advertising, accounting, or health care services) have c...

Although genetic mutations in bacteria and viruses can lead to epidemics, some epidemics are caused by bacteria and viruses that have undergone no sig...

Two modes of argumentation have been used on behalf of women's emancipation in Western societies. Arguments in what could be called the "rela...

Some observers have attributed the dramatic growth in temporary employment that occurred in the United states during the 1980's to increased parti...

Although numbers of animals in a given region may fluctuate from year to year, the fluctuations are often temporary and, over long periods, trivial. S...

In recent years, teachers of introductory courses in Asian American studies have been facing a dilemma nonexistent a few decades ago, when hardly any ...

In an attempt to improve the overall performance of clerical workers, many companies have introduced com- puterized performance monitoring and control...

Schools expect textbooks to be a valuable source of information for students. My research suggests, however, that textbooks that address the place of ...

Until recently, scientists did not know of a close verte- brate analogue to the extreme form of altruism abserved in eusocial insects like ants and be...

Coral reefs are one of the most fragile, biologically complex, and diverse marine ecosystem on Earth. This ecosystem is one of the fascinating paradox...