“In humans, there are obvious sex differences in children's toy play, and these are remarkably similar across cultures，” says Kahlenberg. “While socialization by elders and peers has been the primary explanation, our work suggests that biology may also have an important role to play in activity preferences.”

　　In 14 years of data on chimpanzee behavior at the Kibale National Park in Uganda，Kahlenberg and Wrangham counted more than 100 examples of stick­carrying.

　　Some young chimpanzees carried sticks into the nest to sleep with them and on one occasion built a separate nest for the stick. “We have seen juveniles occasionally carrying sticks for many years, and because they sometimes treated them rather like dolls, we wanted to know if in general this behavior tended to represent something like playing with dolls，” says Wrangham, a Professor at Harvard. “If the doll hypothesis (假设) was right, we thought that females should carry sticks more than males do, and that the chimpanzees should stop carrying sticks when they had their first child. We have now watched enough young chimpanzees to prove both points.”

　　1．What does a female chimpanzee do with sticks?

　　A．She gives them to her child to play with.

　　B．She treats them as weapons.

　　C．She treats them as dolls.

　　D．She makes useful tools from them.

【2017届湖北专版高考英语一轮复习讲义：Unit2《Cloning》（新人教版）选修8（课前基础导练+课堂互动探究+课后知能提升）】相关文章：

★ 北京市2014高考英语一轮复习 练习手册（19）必修4 Unit 4 Body language（含解析）新人教版

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修1 unit1《Friendship》

★ 2014届高考英语一轮复习课时作业(八)必修2Module 2《No Drugs》（外研版）

★ 【浙江专用】2014届高考英语一轮复习课时作业(十四)必修3 Unit 4《Astronomy：the science of the stars》

★ 2017届高考英语二轮复习课时训练：18（含解析）

★ 2017届高考英语二轮复习课时训练：8（含解析）

★ 北京市2014高考英语一轮复习 练习手册（31）选修7 Unit 1 Living well（含解析）新人教版

★ 2014届高考英语一轮复习课时作业(三十五)选修6Module 5《Cloning》（外研版）

★ 2014届高考英语一轮复习课时作业(三十四)选修6Module 4《Music》（外研版）

★ 四川省2016届高考英语一轮复习课时作业（35） Module 5 Cloning 外研版选修6