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SAT阅读模拟练习题

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摘要:以下是小编整理的SAT阅读模拟题之diseases from the Old World Increasingly, historians are blaming diseases imported,最后有答案,希望各位考生主动思考做出题目再对照答案。

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  from the Old World for the staggering disparity between

  the indigenous population of America in 1492—new esti-

  mates of which soar as high as 100 million, or approxi-

  (5) mately one-sixth of the human race at that time—and

  the few million full-blooded Native Americans alive at

  the end of the nineteenth century. There is no doubt that

  chronic disease was an important factor in the precipi-

  tous decline, and it is highly probable that the greatest

  (10) killer was epidemic disease, especially as manifested in

  virgin-soil epidemics.

  Virgin-soil epidemics are those in which the popula-

  tions at risk have had no previous contact with the

  diseases that strike them and are therefore immunologi-

  (15) cally almost defenseless. That virgin-soil epidemics were

  important in American history is strongly indicated by

  evidence that a number of dangerous maladies—small-

  pox, measles, malaria, yellow fever, and undoubtedly

  several more—were unknown in the pre-Columbian

  (20) New World. The effects of their sudden introduction

  are demonstrated in the early chronicles of America,

  which contain reports of horrendous epidemics and steep

  population declines, confirmed in many cases by recent

 

  quantitative analyses of Spanish tribute records and

  ……

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