Data gathered by weather satellites has been analyzed by scientists, reporting that the Earth’s northern latitudes have become about ten percent greener since 1980, due to more vigorous plant growth associated with warmer temperatures and higher levels of atmospheric carbon dioxide.

On account of a law passed in 1993, making it a crime punishable by imprisonment that a United States citizen hold gold in the form of bullion or coins, immigrants found that on arrival in the United States they had to surrender all of the gold they had brought with them.

Competition in the mid-nineteenth century by large western farms gradually caused farmers in Pennsylvania to turn to livestock raising, but before that it was predominantly grain-producing.

The coyote is one of several recent ecological success stories: along with the white-tailed deer, the moose, and other species that are enlarging their natural domains, they have established themselves as supreme adapters in an era when the capability to adjust to the environmental change...

Unlike the conviction held by many of her colleagues that genes were relatively simple and static, Barbara McClintock adhered to her own more complicated ideas about how genes might operate, and in 1983, at the age of 81, was awarded a Nobel Prize for her discovery that the genes in corn a...

【OG19-P514-557题】More and more law firms specializing in corporate taxes are paid on a contingency-fee basis. Under this arrangement, if a case is won, the firm usually receives more th...

【OG19-P529-607题】Previously, Autoco designed all of its cars itself and then contracted with specialized parts suppliers to, build parts according to its specifications. Now it plans to...

【OG19-P511-548题】A provincial government plans to raise the gasoline tax to give people an incentive to drive less, reducing traffic congestion in the long term. However, skeptics point...

【OG19-P510-544题】Neuroscientist: Memory evolved to help animals react appropriately to situations they encounter by drawing on the past experience of similar situations. But this does n...

 【OG19-P409-502题】The author mentions patients’ ages (highlight text) primarily in order to

【OG19-P397-473题】Which of the following, if true, would most strengthen the author's assertion regarding economic indicators in highlight  text?

【OG19-P396-472题】Which of the following conclusions about the Great Depression is best supported by the passage?

【OG19-P424-541题】The author of the passage mentions calculations about tunneling time and barrier thickness in order to

【OG19-P548-667题】It is widely assumed that people need to engage in intellectual activities such as solving crossword puzzles or mathematics problems in order to maintain mental sharpne...

【OG19-P548-666题】With seventeen casinos, Moneyland operates the most casinos in a certain state. Although intent on expanding, it was outmaneuvered by Apex Casinos in negotiations to ac...