A. graphite, C02
B. graphite, air
C. heavy water, C02
D. lead, H2
E. concrete, N2
Correct Answer: graphite, C02 ✔
Last Updated: January 24, 2019
A. graphite, C02
B. graphite, air
C. heavy water, C02
D. lead, H2
E. concrete, N2
Correct Answer: graphite, C02 ✔
Last Updated: January 24, 2019