Cover of Focus 4 (2nd edition) - Student's Book

Answer — Exercise 1

7.7 - Use of English·Focus 4 (2nd edition) - Student's Book

Question

What do you know about GPS? Discuss the questions.

Answer

  1. Global Positioning System
  2. Three satellites measure the distance and triangulate your position, a fourth one corrects the position.
Exercise 2 →

More exercises in 7.7 - Use of English

Ex. 2
Ex. 3
Ex. 4
Ex. 5
Ex. 6
Ex. 7
Ex. 8
Ex. 9
Ex. 11