一个小知识点,谢谢大家.

page 41 No. 16题

In the 1960’s, long-term studies of primate behavior often used as subjects tamarins, small monkeys that were thought ideal because they require only small cages, breed frequently, and grow quickly, Field studies were not used because they were costly and difficult. Tamarins were kept caged in male-female pairs, because otherwise, serious fights erupted between unrelated femails. On the basis of the fact that breeding occurred, tamains were viewed as monogamous.

The view taken by the researchers concerning the monogamy of tamarins depended on a questionable assumption. Which of the following could have served as that assumption?

used as subjects tamarins   ：自由感觉好象不对吧？！应该是 used tamarins as subjects 吧？谢谢大家。虽然这个不是考试的重心，不过还是把英语学的扎实一些比较好。谢谢大家帮助自由。