— This is a great chance that many people don't have.
— I see. I'll cherish(珍惜) it.
A:achievement
B:opportunity
C:journey
3只猫3天吃了3只老鼠,照这样的效率,12只猫12天能吃____ 只.
反应C(s)+H2O(g)⇌CO(g)+H2(g)在一定密闭容器中进行,则下列说法或结论中,能够成立的是( )