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【单选题】
检索文献数据库时,下列哪种方法不能扩大检索范围( )。A.
主题词加权
B.
逻辑检索OR
C.
用主题词扩展
D.
采用截词
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】TCP/IP协议簇中,应用层的各种服务是建立在传输层所提供服务的基础上实现的,下列哪组协议需要使用TCP协议建立连接( )。
A.
DNS,DHCP,FTP
B.
TELNET,SMTP,HTTP
C.
BOOTP,FTP,TELNET
D.
SMTP,FTP,TFTP
【简答题】miner: You required to write the definition and parts of speech of the word and write your own sentences using the word about topics that interest you.
【简答题】Please write the definition of logistics according to the CLM.
【简答题】comrade: You required to write the definition and parts of speech of the word and write your own sentences using the word about topics that interest you.
【简答题】Sentence: You required to write the definition and parts of speech of the word and write your own sentences using the word about topics that interest you.
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