A. liquid fuel only
B. liquid fuel and air
C. solid fuel
D. solid fuel and air
E. does not exist
Correct Answer: liquid fuel only ✔
Last Updated: May 18, 2023
A. liquid fuel only
B. liquid fuel and air
C. solid fuel
D. solid fuel and air
E. does not exist
Correct Answer: liquid fuel only ✔
Last Updated: May 18, 2023