阿巴拉契亚山道

6 (p1): Famous Places
6 (p2): Reading Objectives
9 (p3): The Pyramids
11 (p4): The Great Wall of China
13 (p5): The Colosseum
15 (p6): The Taj Mahal
17 (p7): The Empire State Building
19 (p8): The Sydney Opera House
22 (p9): Time by the Clock
22 (p10): Reading Objectives
23 (p11): lt's About Time
24 (p12): Sundials
26 (p13): Water Clocks
28 (p14): Mechanical Clocks
30 (p15): Pendulum Clocks
32 (p16): Clocks Today
34 (p17): Comparing Clocks
36 (p18): Appalachian Trail
36 (p19): Reading Objectives
37 (p20): Let's Go on a Hike
40 (p21): A Dream Comes True
42 (p22): Packing for the Trip
44 (p23): The Journey Begins
50 (p24): Rocky Peaks
53 (p25): Nearing the End
58 (p26): Alaska
58 (p27): Reading Objectives
59 (p28): Welcome to Alaska
61 (p29): Alaska's Weather
64 (p30): People of Alaska
70 (p31): Alaska:A Big Adventure
74 (p32): Review Activities
74 (p33): Think and Discuss
76 (p34): Multiple-Choice Test
80 (p35): Index Ben tao cong shu gong 18 ce, han gai 9 ge zhu ti, 72 ge hua ti, she ji shu xue, ke xue yu she hui yan jiu san ge xue ke ling yu