题干
The poor mother _____and wept when she heard the news that her five-year-old son had been kidnapped.
A：broke out
B：broke dow
C：broke u
D：broke off
答案(点此获取答案解析）
B
2SO3(g)；已知反应过程中某一时刻，SO2、O2、SO3分别是0.2mol/L、0.1mol/L、0.2mol/L，当反应达到平衡时，可能存在的数据是