2. 外语
  3. search engines 此处考查第五点研究策略：“Use Internet directories and search engines selectively to locate authoritative，high-quality website

search engines 此处考查第五点研究策略：“Use Internet directories and search engines selectively to locate authoritative，high-quality website

admin2018-06-02  56
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答案search engines
解析 此处考查第五点研究策略：“Use Internet directories and search engines selectively to locate authoritative，high-quality websites.”，即利用互联网名录和搜索引擎有选择地寻找权威可靠的高质量网站，因此填入search engines。
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