实施卫生注册及质量许可证管理的货物，应提供出人境检验检疫机构签发的卫生注册/质量许可

《明史》记载“居正为政，以尊主权、课吏职、信赏罚、一号令为主。虽万里外，朝下而夕奉行。……及吏部左侍郎张四维人，恂恂若属吏，不敢以僚自处。……诏尽削居正官秩，夺前所赐玺书、四代诰命，以罪状示天下”。内阁首辅张居正的生前死后的不同状况折射出[ ]

A．内阁职权大小取决于皇帝的旨意

B．内阁成为法定的中央决策机构

C．皇权与相权的矛盾一度激化

D．六部正式成为内阁的下属机构

The network layer provides services to the transport layer. It can be based on either（71）. In both cases，its main job is （72） packets from the source to the destination. In network layer，subnets can easily become congested，increasing the delay and（73）for packets. Network designers attempt to avoid congestion by proper desing,Techniques include （74） policy，caching，flow control，and more. The next step beyond just dealing with congestion is to actually try to achieve a promised quality of service. The methods that can be used for this include buffering at the client，traffic shaping，resource（75），and admission control. Approaches that have been designed for good quality of service include integrated services (including RSVP), differentiatd services, and MPLS.

空白处(71)应选择（）

A．virtual circuits or datagrams

B．TCP or UDP

C．TCP or IP

D．IP or AR

The story is the same for many urban white-collar workers in China now: they’re putting in overtime to reduce the risk of being      .

A．laid down

B．turned off

C．laid off

D．turned down

政府收入的组织原则

现代图像显示技术可以完成以下哪些选项的形象显示？（）

A.虚拟3D图像

B.开关量控制

C.模拟量控制

D.息状态

E.参数变化