They oppose the further mechanization of work, which, according to their findings, tends to perpetuate existing inequalities in society.
23. Which of the following best describes the function of the concluding sentence of the passage?
It sums up the general points concerning the mechanization of work made in the passage as a whole.
It draws a conclusion concerning the effects of the mechanization of work which goes beyond the evidence presented in the passage as a whole.
It restates the point concerning technology made in the sentence immediately preceding it.
It qualifies the authors agreement with scholars who argue for a major revision in the assessment of the impact of mechanization on society.
It suggests a compromise between two seemingly contradictory views concerning the effects of mechanization on society.
Warm-blooded animals have elaborate physiological controls to maintain constant body temperature . Why then during sickness should temperature rise, apparently increasing stress on the infected organism? It has long been known that the level of serum iron in animals falls during infection. Garibaldi first suggested a relationship between fever and iron. He found that microbial synthesis of siderophores substances that bind ironin bacteria of the genus Salmonella declined at environmental temperatures above 37℃ and stopped at 40.3℃. Thus, fever would make it more difficult for an infecting bacterium to acquire iron and thus to multiply. Cold-blooded animals were used to test this hypothesis because their body temperature can be controlled in the laboratory. Kluger reported that of iguanas infected with the potentially lethal bacterium A. hydrophilia, more survived at temperatures of 42℃ than at 37℃, even though healthy animals prefer the lower temperature. When animals at 42℃ were injected with an iron solution, however, mortality rates increased significantly. Research to determine whether similar phenomena occur in warm-blooded animals is sorely needed.
【gre考试阅读真题解析(B)】相关文章:
最新
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01