题目内容
CCS分类体系中一级主类的设置，以专业划分为主，其中F代表（）。
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简述髁突骨折的治疗。
A transport layer protocol has several responsibilities, One is to create a process-to-process (program-to-program) communication; TCP uses port (1) to accomplish this. Another responsibility of a transport layer protocol is to create a (2) and error-control mechanism at the transport level. TCP uses a sliding (3) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve (4) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends (5) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.空白（3）处应选择（）
铸铁中的碳若以（）状石墨形式存在，其断面呈暗灰色，称为（）铸铁，若以（）状石墨形式存在，则称为（）铸铁。
多数国家监测泌尿系感染占部位构成比是（）
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