更多"Who sent a dog up in a man-made Ear"的相关试题:
[单项选择]Researchers who picked up and analyzed wild chimp droppings said on Thursday they had shown how the AIDS virus originated in wild apes in Cameroon and then spread in humans across Africa and eventually the world. Their study, published in the journal Science, supports other studies that suggest people somehow caught the deadly human immunodeficiency virus (HIV) from chimpanzees, perhaps by killing and eating them.
"It says that the chimpanzee group that gave rise to HIV... this chimp community resides in Cameroon," said Beatrice Hahn of the University of Alabama, who led the study. "But that doesn’t mean the epidemic originated there because it didn’t," Hahn, who has been studying the genetic origin of HIV for years, said in a telephone interview.
"We actually know where the epidemic took off. The epidemic took off in Kinshasa, in Brazzaville." Kinshasa is in the Democratic Republic Congo, formerly Zaire, and faces Brazzaville, in Congo, across the Congo River. Studies have
A. Cameroon.
B. Kinshasa and Brazzaville.
C. Congo River.
D. Nile River.
[填空题]Men who bottle up their anger at being unfairly treated at work are up to five times more likely to (47) a heart attack, or even die from one, than those who let their (48) show, a Swedish study has found.
The study followed 2,755 employed men who had not suffered any heart attacks from 1992 to 2003. At the end of the study, 47 (49) had either suffered an attack, or died from heart disease, and many of those had been found to be "covertly coping" with unfair (50) at work.
"After adjustment for age, socioeconomic factors, risk behaviors, job (51) and biological risk factors at baseline(基线 ), there was a close-response relationship between covert coping and the risk of incident myocardial infarction (心肌梗塞) or cardiac death," the study’s authors wrote. Covert coping was listed as "letting thing pass without saying anything" and "going away" (52) feelings of being hard done by colleagues or bosses.
Men who often
