Below is a text with blanks. Click on each blank, a list of choices will appear. Select the appropriate answer choice for each blank.
下面的文本有一些空格。点击每个空格会出现一组选项，请为每个空格选出最合适的答案。
Comparing the intelligence of animals of different species is difficult, how do you compare a dolphin and a horse? Psychologists have a technique for looking at intelligence that not require the cooperation of the animal involved. The relative size of an individual's brain is a reasonable indication of intelligence. Comparing species is not as simple an elephant will have a larger brain than a human simple because it is a large beast. we use the Cephalization Index, which compare the size of an animal's brain to the size of its body. Based on the Cephalization Index, the brightest animals on the planet are humans, by grate apes, porpoises and elephants. As a general animals that hunt for a living (like canines) are smarter than strict vegetarians (you don't need much intelligence to outsmart a leaf of lettuce). Animals that live in a social groups are always smarter and have large EQ's than solitary animals.
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