题干
28. Those who bring sunshine into the lives of others cannot keep ____ from themselves．
A：it
B：one
C：those
D：Them
答案(点此获取答案解析）
A
A：it
B：one
C：those
D：Them
CO2(g)＋H2(g)，反应达到平衡后，测得CO2的物质的量为0.6 mol。然后再充入4 mol H2O(g)，达到新的平衡后，CO2的物质的量为( )
