不知大家对新G argument 第二个有什么看法

lesleyone · 发表于 2012-8-4 23:15:44

A recent study of eighteen rhesus monkeys provides clues as to the effects of birth order on an individual"'s levels of stimulation. the study showed that in stimulating situations(such ad an encounter with an unfamiliar monkey), firstborn infant monkeys preduce up to twice as much of the hormone cortisol, which primes the body for increased activity levels, as do their younger siblings. firstborn humans also produce relatively high levels of cortisol in stimulating situations such as the return of a parent after an absence). the study also found that during pregnancy, first-time mother monkeys had higher levels of cortisol than did those who had had several offspring

[argument] 不知大家对新G argument 第二个有什么看法

所属分类: GRE考试

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