Contents 1
LESSON 1 How to Study English 1
LESSON 2 Try,Try Again 3
LESSON 3 Counting and Measuring in Old Times 6
General Review 1 10
LESSON 4 Scientists'Language 14
Supplementary Reading:A Dialogue 17
LESSON 5 Something about tie Sun 19
LESSON 6 Motion of Sound 23
Supplementary Reading:Velocity of Sound 27
General Review 2 30
LESSON 7 Tomorrow Is with Us 33
LESSON 8 Dreiser's Letter to William Z．Foster 38
Supplementary Reading:Our Faith in Victory 41
LESSON 9 A．S．Popov,the Inventor of Radio 43
General Reuiew 3 48
Reading Material:The Air 52
LESSON 10 Experiments in Physics 53
Supplementary Reading:Energy 55
LESSON 11 Michael Faraday 58
LESSON 12 Power—An Important Factor of Productive Force 63
Supplementary Reading:Learn by Asking 66
LESSON 13 Galileo and the Lamps 69
LESSON 14 Electronic Computers 72
Supplementary Reading: Electronics and Its Applications 75
General Reuiew 4 77
Reading Material:Atomic Energy 81