题干
——I feel so tired after a long walk.
——You had better have a ______.
A：talk
B：rest
C：swim
D：look
答案(点此获取答案解析）
B
——I feel so tired after a long walk.
——You had better have a ______.
A：talk
B：rest
C：swim
D：look
2CO+O2(反应从CO2开始)平衡体系的平均相对分子质量为M，在此条件下，CO2的分解率为