小学五年级科学 Science 我们在成长We are in growth 情景剧思考:为什么彬彬的声音变嘶哑了?Thinking: Why has Binbin’s voice become raucous?In Binbin’s homeYanyan: Hi! Let’s do homework.Binbin: OK! My Mom will give us yummy fruit after we finish it.Qiqi: Why has Binbin’s voice become raucous?Binbin: I don’t know.MoM: Because Binbin is growing up.Qiqi: Really? My voice will become raucous.Little Boy little trouble 情..