We were amused at his movements in doing morning exercises.
A:valuable
B:harmful
C:funny
一杯酒精用掉一半,剩下一半的质量、比热容、热值 ( )
2CO2(g)+6H2(g) CH3CH2OH(g)+3H2O(g)①298K时,K1=2.95×1011
2CO(g)+4H2(g) CH3CH2OH(g)+H2O(g)②298K时,K2=1.71×1022
根据句意用所给词的适当形式填空。