【单选题】Despite signs of strong economic recovery, American companies are still pressed for ______.
【单选题】The ______ now seems to stand as the primary to a new era of strong economic growth.
【单选题】路由器工作于( ),用于连接多个逻辑上分开的网络。
【单选题】路由器工作于( ),用于连接多个逻辑上分开的网络。
【单选题】The ______ now seems to stand as the primary barrier to a new era of strong economic growth.