2022年山东省滨州市中考英语真题（精品解析版）

Dolphins greet one another with whistles (哨声). They can hear other dolphins from many kilometers away. Every dolphin has a different whistle. When two groups of dolphins meet, they each choose a member to “talk” to the other group. The two groups can then travel together. Unlike most of the other animals, dolphins are smart enough to learn a new language by inventing and copying new sounds.