[单项选择] New ice core samples taken from the centre of the Greenland ice-sheet have given a detailed record of the last "interglacial (间冰期)" which rail from about 135,000 to 115,000 years ago. The cores, taken from a depth of 2,780 to 2,870 metres, show that during this period the climate oscillated(摆动) between three states instead of remaining in one, as in the whole of recorded human history. The middle state was like our own, but the others were either’’ much colder or warmer. Worse, it seems that the climate flipped from one condition to another very rapidly. "It apparently took very little time, perhaps less than a decade or two, to shift between the states," Dr. J.C. W. White of the Institute of Arctic and Alpine Research at the University of Colorado wrote earlier this year in the scientific journal, Nature: "We humans have built a remarkable socio-economic system during perhaps the only time when it could be built, when the climate was stable enough to let us develop the agricul
A. there is an unseen hand controlling the earth’’ s movement
B. there is an operating manual warning people against air-conditioning in the factory
C. people should prepare operating manuals to tell workers how to get greater comfort
D. people have been enjoying the most comfortable climate in Earth’’ s history.

[单项选择] New ice core samples taken from the centre of the Greenland ice-sheet have given a detailed record of the last "interglacial (间冰期)" which rail from about 135,000 to 115,000 years ago. The cores, taken from a depth of 2,780 to 2,870 metres, show that during this period the climate oscillated(摆动) between three states instead of remaining in one, as in the whole of recorded human history. The middle state was like our own, but the others were either’’ much colder or warmer. Worse, it seems that the climate flipped from one condition to another very rapidly. "It apparently took very little time, perhaps less than a decade or two, to shift between the states," Dr. J.C. W. White of the Institute of Arctic and Alpine Research at the University of Colorado wrote earlier this year in the scientific journal, Nature: "We humans have built a remarkable socio-economic system during perhaps the only time when it could be built, when the climate was stable enough to let us develop the agricul
A. The climate in recorded human history has generally remained stable.
B. The climate from about 135,000 to 115,000 years ago was in a extremely cold state.
C. The human race has been lucky to have enjoyed the most favorable period of climate for them to build a socio-economic system.
D. The evidences scientists collected from the ice cores suggest that a civilization can not have arisen in the period from about 135,000 to 115,000.

[单项选择]{{B}}Passage Two{{/B}}