The indexing and abstracting services depend heavily on the accuracy of the title.

概念题[br][/br]指数化( indexing)

For feature extraction, the effectiveness of an indexing scheme depends on the effectiveness of __________ in content presentation.

中国大学MOOC:" Keywords are mainly for indexing, that is, for readers to retrieve the article.";

Keywords are mainly for indexing, that is, for readers to retrieve the article. A: 正确 B: 错误

指数化策略（Indexing Strategy）是一种被动（或消极）的投资策略。? 错误|正确

The use of EMtree includes: A: Search extension words to prevent missing B: Browse the hyponyms of extension words C: Find indexing preferences D: The key words are determined by term information