Unit One Section One Section Two Section Three Passage A Passage B Section Four
Unit Two Section One Section Two Section Three Passage A Passage B Section Four
Unit Three Section One Section Two Section Three Passage A Passage B Section Four Water................................................1 Speaking................................................................. 1 Listening................................................................. 2
Three Gorges Dam (Ⅰ)........................................................21
Three Gorges Dam (Ⅱ).........................................................25 Writing..................................................................29
Dams (Ⅰ).................................................... 33 Speaking...............................................................33 Listening...............................................................35 Reading ................................................................37 A Gravity Dam......................................................................37 An Arch Dam ........................................................................41 Writing..................................................................45
Unit Four Section One Section Two Section Three Passage A Passage B Section Four
Unit Five Section One Section Two Section Three Passage A Passage B Section Four
Unit Six Section One Section Two Section Three Passage A Passage B Section Four Dams (Ⅱ).................................................... 49 Speaking...............................................................49 Listening...............................................................51
The Embankment Dam.......................................................53
The Inflatable Dam .............................................................57 Writing..................................................................62
A Normal Channel Spillway ................................................69
A Side Channel Spillway .....................................................74 Writing..................................................................77