The famous musician, as well as his students, ____ to perform at the opening ceremony of the 2012 Taipei Flower Expo.

A．were invited

B．was invited

C．have been invited

D．has been invited

某网络结构如下图所示。R2收到了一个目的主机IP地址为175.150.25.0的IP数据报，那么它为该数据报选择的下一路由器地址为( )。

A．175.150.10.10

B．175.150.50.5

C．175.150.50.10

D．直接投递