Rm+与Xn-具有相同的电子层结构，则两种微粒半径大小关系为（ ） A．前者大于

男，50岁，缺失，行可摘局部义齿修复，作基牙，稍向近中倾斜，选择就道时，模型放在观测台上应（）

A．向左倾斜

B．向右倾斜

C．向前倾斜

D．向后倾斜

E．平放

有关硬膜外阻滞麻醉并发硬膜外血肿的处理，下列正确的是（）。

A.血肿形成后8小时内进行椎板切开减压术，清除血肿

B.血肿形成后24小时内进行椎板切开减压术，清除血肿

C.血肿形成后36小时内进行椎板切开减压术，清除血肿

D.血肿形成后48小时内进行椎板切开减压术，清除血肿

E.血肿形成48小时后进行椎板切开减压术，清除血肿

依据《安全生产法》的规定，矿山企业应当建立应急救援组织：生产规模较小的，可以不建立应急救援组织，但应当（）。

A.与政府监管部门签订救援协议

B.与保险公司签订意外伤害保险协议

C.指定专职的应急救援人员

D.指定兼职的应急救援人员

公益广告的设置须遵循一些原则，下列选项中不属于公益广告设置原则的是（）。

A．思想性原则

B．艺术性原则

C．针对性原则

D．营利性原则

The de facto standard application program interface （API）for TCP/IP applications is the "sockets" interface. Although this API was developed for （1）in the early 1980s. it has also been implemented on a wide variety of non-Unix systems. TCP/IP（2） written using the sockets API have in the past enjoyed a high degree of portability and we would like the same（3） with IPv6 applications. But changes are required to the sockets API to support IPv6 and this memo describes these changes. These include a new socket address structure to carry IPv6 （4）, new address conversion functions, and some new socket options. These extensions are designed to provide Access to the basic IPv6 features required by TCP and UDP applications, including multicasting, while introducing a minimum of change into the system and providing complete （5）for existing IPv4 applications.

（4）是（）

A.connections

B.protocols

C.networks

D.addresses