账龄分析是（）中一项十分重要的功能。
A、往来核算
B、费用预算
C、工资管理
D、报表管理
参考答案：A
Quite a few people were injured or killed in this traffic accident last week, ________?
A．were they
B．did they
C．weren’t they
D．didn’t they
等物质的量的下列有机物充分燃烧时，消耗氧气最多的是
A．甲烷
B．乙烯
C．苯
D．乙醇
