20世纪六十年代,美国生态学家John B. Calhoun进行了一场名为Mouse Utopia Experiment(“老鼠世界”又译为“老鼠乌托邦”)的实验。他将4公4母总计4对白鼠放在一个由谷仓改建的实验场地中,这个小世界是一个边长为2.7米,高1.4米的的方形金属栅栏围成的空间,每一边各有四条垂直的,铁丝网做成的楼梯,每个楼梯都通往...
20世纪六十年代,美国生态学家John B. Calhoun进行了一场名为Mouse Utopia Experiment(“老鼠世界”又译为“老鼠乌托邦”)的实验。 他将4公4母总计4对白鼠放在一个由谷仓改建的实验场地中,这个小世界是一个边长为2.7米,高1.4米的的方形金属栅栏围成的空间,每一边各有四条垂直的,铁丝网做成的隧道,每个隧道都通往...
In John B. Calhoun's early crowding experiments, rats were supplied with everything they needed – except space. The result was a population boom, followed by such severe psychological disruption that the animals died off to extinction. The take-home message was that crowding resulted in ...
A classic series of experiments to determine the effects of overpopulation on communities of rats was conducted by a psychologist,John Calhoun.In each experiment,an equal number of male and female adult rats were placed in an enclosure(场地).The rat populations were allowed to increase.Calhoun kne...
B.Calhoun had experimented with rats before. C.Calhoun’s experiment is still considered important today D.Stress does not occur in rat communities unless there is overcrowding. 【小题2】The author implies that the behavior of the leading male rats is sometimes similar to that of ...
Calhoun, while at the same time it furnished points of contact that might, if occasion should offer, be laid hold of for the purpose of forming a temporary alliance with Mr. Clay and the National Republicans. The origin of the name "Whig," in its strange and anomalous application to the...
Experiment Perilous (1944) His Gal Friday 1940 Holiday Affair 1949 How Green Was My Valley 1941 I Know Where I'm Going! 1945 I Married a Witch 1942 I Take This Woman (1940) Johnny Belinda (1948) Kind Hearts and Coronets 1949 Leave Her to Heaven (1945) Mildred Pierce 194...
Experiment Perilous (1944) His Gal Friday 1940 Holiday Affair 1949 How Green Was My Valley 1941 I Know Where I'm Going! 1945 I Married a Witch 1942 I Take This Woman (1940) Johnny Belinda (1948) Kind Hearts and Coronets 1949 Leave Her to Heaven (1945) Mildred Pierce 194...
阅读理解 A classic series of experiments to determine the effects of overpopulation on communities of rats was conducted by a psychologist John Calhoun.In each experiment an equal number of male a
Calhoun's experiments have influenced many people (2) Which of the following inferences can NOT be made from the first paragraph? [ ] A. Calhoun's experiment is still considered important today. B. Overpopulation causes pathological behavior in rat populations. ...