题干
__________ arrived ten minutes after Mrs Cousins telephoned them.
A：The police
B：The polices
C：A policemen
D：Police
答案(点此获取答案解析）
A
CO2（g）+ H2（g）达到平衡后，测得CO2为0．6mol，再通入4mol水蒸气，达到平衡后CO2的物质的量为