The word “it” in line 7 refers to which of the following? A. A radar set B. A short burst C. A radiation wave D. Light
The word “it” in line 7 refers to which of the following?
A. A radar set
B. A short burst
C. A radiation wave
D. Light
Lời giải:
5. Thông tin: Radar sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off the objects.
Đáp án: D