A Before Reading 1
1 Air and Gravity 3
2 Birds 8
3 Kites 15
4 Boomerangs 17
5 Balloons 18
6 Airships 21
7 Parachutes 23
8 Hang-gliders 25
9 Gliders 26
10 Powered Flight 29
B While Reading 33
11 Helicopters 35
12 Jet Aircraft 37
13 Supersonic Areoplanes 39
14 Vertical Take-off 40
15 Hovercraft 41
16 Flying an Aeroplane 42
17 Wings 46
18 Speed 49
19 Flight and Gravity 50
20 Space Flight 51
C After Reading 51
Points for Understanding 53
Answer Key 59
新标准中小学分级英语读物 64