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局域网是当前计算机网络研究与应用物一个热点，而符合IEEE802．3标准的传统Ethemet应用最为广泛。它在物理层采用（）标准。
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Rapid advances in computer and communication technologies have resulted in the (58) merger of these two fields. The lines have bluned among computing, switching, and digital transmission equipment, and the same digital techniques are being used for data, voice, and image transmission. Merging and evolving technologies, coupled with increasing demands for efficient and timely collection, processing, and (59) of information, are leading to the development of (60) that transmit and process all types of data. The ultimate goal of this evolution is something its proponents-some of the most powerful forces in the computing and telecommunications industries-call the (61) .The (61) will be a worldwide public telecommunications network that will deliver a wide variety of services. The (61) will be defined by the standardization of user interfaces, and will be implemented as a set of digital switches and paths supporting a broad range of traffic types and providing (62) processing services. Inpractice, there will be multiple networks, implemented within national boundaries, but from the user’s point of view there will be a single, uniformly accessible worldwide network. Rapid advances in computer and communication technologies have resulted in the（）merger of these two fields.
Internet的电子邮件、文件传输或Web访问总分别采用了（）、FTP和（）等协议。
PKICA体系采用非对称密匙体系，通过一个证书签发中心为每个用户和服务器颁发一个证书，之后用户和服务器、用户和用户之间通过证书相互验证对方的合法性，其标准是能否用CA中心的（）对个人证书和服务器证书进行解密，而CA中心的（）存在于公开的CA根证书里。
【案例二】患者，男性，24岁。自己回忆，3岁时总跟着妈妈到女澡堂洗澡，觉得很自然，并无害羞心理。到了五六岁时，跟父亲到男澡堂洗澡，却感到不自然，觉得特别紧张，但经过一两次后，觉得对男人有好感，喜欢观察男人身体。父母同事们都说他像小女孩，根本看不出男孩的个性，他不但不恼，反而非常喜欢听这种称他像女孩的话，自认为有着比女孩还要丰富细腻的心理。曾拒绝一女孩的求爱，称自己也是女孩子，在心理上也想找个男人。对于别人认为他是同性恋，他也坚决否认，认为自己完全是一个女人生存于男人的躯体里面。目前正到处搜集变性手术方面的资料，希望能改变自己的性别，使得身心能够统一。体检：生殖系统解剖生理特征无异常。精神检查：意识清，应答切题，未见明显幻觉妄想，情感反应适切。自称躯体完全是男人的结构，可以勃起、射精、产生性交的欲望，但从未与女人发生过任何关系，性交欲望的对象始终是男人。请回答以下问题： 该男子的性心理特征是什么？
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