2020考研英语阅读冲刺模拟题及答案(2)..pdfVIP

考研英语阅读冲刺模拟题及答案 （） 考研英语阅读冲刺模拟题及答案 （） 2020 2 2020 2 As Gilbert WhiteDarwin and others observed long agoall  As Gilbert WhiteDarwin and others observed long agoall  ， ， ， ， ， ， species appear to have the innate capacity to increase their numbers  species appear to have the innate capacity to increase their numbers  from generation to generation. The task for ecologists is to untangle  from generation to generation. The task for ecologists is to untangle  the environmental and biological factors that hold this intrinsic  the environmental and biological factors that hold this intrinsic  capacity for population growth in check over the long run. The great  capacity for population growth in check over the long run. The great  variety of dynamic behaviors exhibited by different population  variety of dynamic behaviors exhibited by different population  makes this task more difficult some populations remain roughly  makes this task more difficult： some populations remain roughly  ： constant from year to year others exhibit regular cycles of abundance  constant from year to year others exhibit regular cycles of abundance  and scarcity still others vary wildlywith outbreaks and crashes that  and scarcity still others vary wildlywith outbreaks and crashes that  ， ， are in some cases plainly correlated with the weathearnd in other  are in some cases plainly correlated with the weathearnd in other  ， ， cases not.  cases not.  To impose some order on this kaleidos