资产负债表、利润表、所有者权益变动表和现金流量表属于向企业外部提供会计信息的会计报表。( )
参考答案：对
The old man ____ for three years. [ ]
A. has died
B. has been died
C. has been dead
下列哪些交换机性能指标的改变不能提高网络吞吐量（）
A.交换容量的加大
B.交换带宽
C.增加端口
D.提高转发速率
