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《就任北京大学校长之演说》写作特点有哪些？
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急性盆腔炎治疗中，占有重要地位的是（）
The de facto standard Application Program Interface (API) for TCP/IP applications is the “sockets” interface. Although this API was developed for （71） in the early 1960s it has also been implemented on a wide variety of no-Unix systems. TCP/IP （72） Written using the sockets API have in the past enjoyed a high degree of portability and we would like the same （73） 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 （74） ,new address conversion functions, and some new socket options. These extensions are designed to provide access to the basic IPv6 features requited by TCP and UDP applications, including multicasting, while introducing a minimums of change into the system and providing complete （75） for existing IPv4 applications.
程序升温
某患者，戴用金属全冠3天后，咀嚼时修复牙出现咬合痛，且有叩痛，引起的原因最可能是（）。
美发用品的品种大致分为三类：第一类进口、名牌、高档、质优、价低；第二类为合资企业生产的中、高档产品；第三类为国内生产的大众化美发用品。
所有的行政机关都享有行政许可权。
对内检疫
下列关于流行性出血热发热期三痛的叙述，正确的是（）
请写出带薪年休假的规定。
只允许汽缸沿纵向膨胀，而不允许汽缸做横向膨胀的销叫（）。