第2课时 七年级上册 Modules 6～10
一、阅读理解
(2015·山东潍坊中考)
Have you ever thought of why dogs are human's best friends？What's the bond(紧密关系) between human and dogs？A new study by the Japanese scientist Miho Nagasawa seems to have found the answer, and it has to do with something named the cuddle(拥抱) chemical.
The cuddle chemical has another, more scientific name: oxytocin(催产素). Oxytocin is something in the blood that encourages bonding. Levels of oxytocin increase, for example, when a mother feeds her newborn baby. According to Nagasawa's study, levels of oxytocin can also go
