In order to know how heavy the elephant was, he wrote down the weight of each stone and then           ____all the weights.

A．packed up

B．added up

C．went through

D．set down

卷烟和其他快速消费品一样，消费者强调（）。

A、口味的区域性

B、消费的快速性

C、服务的优质性

D、购买的便捷性