gre阅读练习每日一篇(二十六)_GRE阅读

gre阅读练习每日一篇(二十六)

　　23. According to the passage, which of the following is true of the last hundred years?

　　 Fossil fuels were burned for the first time.

　　 Greater amounts of land were cleared than at any time before.

　　 The average temperature at the Earths surface has become 2℃ cooler.

　　 The amount of carbon dioxide in the atmosphere has increased measurably.

　　 The amount of farmland worldwide has doubled.

　　Some modern anthropologists hold that biological evolution has shaped not only human morphology but also human behavior. The role those anthropologists ascribe to evolution is not of dictating the details of human behavior but one of imposing constraintsways of feeling, thinking, and acting that come naturally in archetypal situations in any culture. Our frailtiesemotions and motives such as rage, fear, greed, gluttony, joy, lust, lovemay be a very mixed assortment, but they share at least one immediate quality: we are, as we say, in the grip of them. And thus they give us our sense of constraints.

　　Unhappily, some of those frailtiesour need for ever-increasing security among themare presently maladaptive. Yet beneath the overlay of cultural detail, they, too, are said to be biological in direction, and therefore as natural to us as are our appendixes. We would need to comprehend thoroughly their adaptive origins in order to understand how badly they guide us now. And we might then begin to resist their pressure.