“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届湖北省高三英语一轮复习学案：Unit 2《Cloning》（人教版选修8）】相关文章：

★ 【北京专用】2014届高考英语一轮复习方案课时作业：选修7 Unit 4 Sharing

★ 2014年牛津译林版高中英语总复习（第1轮）同步练习 M6《Unit 3　Understanding each other》

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十三)必修5Unit 3《Life in the future》

★ 2017届高考英语二轮复习课时训练：21（含解析）

★ 2014届高考英语一轮复习课时作业(三十七)选修7Module 1《Basketball》（外研版）

★ 2017届高考英语二轮复习书面表达限时测验：7（含解析）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (26)

★ 2014届高考英语一轮复习选修8参考答案（外研版）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (20)

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（17）模块6 《Unit 17 Laughter》（含解析） 北师大版必修1