A. electromagnetic energy B. electromagnetic
energy travels through space C. came from the sun
D. when a change in the nucleus of an atom takes place E.
when the sunrays are fierce F. chemical energy is
generated
填空题
Visible light that produce warmth is an example of ______.
填空题
We can use energy from the sun because ______.
填空题
The energy stored in coal ______.
填空题
______ when electron rearrangement takes place.