Tuesday, September 13, 2022
Tuesday, September 13, 2022
Sunday, September 11, 2022
问题:利用万方数据库检索题名中出现纤维素酶的博硕士论文应该选择()子库...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:若想climate change 和air pollution同时出现在检索结果中且相隔不超过N个字,应使用的逻辑运算符是()?A、逻辑或B、逻辑与C、逻辑非D、位置算符...
Wednesday, March 20, 2024
Wednesday, October 19, 2022
问题:()是中国古代最早的官修韵书,也是现存最早的完整韵书。...
Sunday, September 11, 2022
问题:国家统计局数据库提供()、()、专题、关键词4种查询方式。()...
Sunday, September 11, 2022
Tuesday, September 13, 2022
Sunday, September 11, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:韩正彪是山东理工大学情报学硕士,2010年考取南开大学博士,第二...
Tuesday, September 13, 2022
问题:在万方的“查新/跨库检索”中,精确检索1990至2013年“作者...
Tuesday, September 13, 2022
Wednesday, October 19, 2022
Tuesday, September 13, 2022