To combine related key terms (e.g., free-text, controlled vocabulary), we use the Boolean operator _________ to __________ our search:

Question

BlackTom AI · Accepted Answer

In this question about combining related key terms, we need to evaluate how Boolean operators affect search strategy.
Option a: 'NOT, exclude' — Using NOT excludes terms from results, which is useful for removing unwanted concepts but does not help to combine related terms. It actively narrows the results by filtering out items that contain the excluded term, so this option misstates both the operator (NOT) and the typical goal of combining related terms.
Option b: 'OR, narrow' — OR is used to broaden a search by including results that contain either term, not to narrow. Therefore describing OR as narrowing is incorrect; the intended effect of OR is to expand the set of results to capture synonyms or related concepts.
Option c: 'OR, expand' — This matches the standard use of OR in search logic: it unites results containing one term or the other, effectively expanding the search to cover more concepts or synonyms. This is the correct pairing for combining related key terms.
Option d: 'AND, expand' — AND narrows the search by requiring both terms to be present, which reduces results rather than expanding. It is used to intersect concepts rather than to broaden coverage, so this pairing is inaccurate for combining related terms.
Option e: 'AND, narrow' — While AND is indeed associated with narrowing, the statement pairs it with 'expand' in a way that contradicts the actual effect. The correct characterization would be 'AND, narrow' without the expansion implication, but as phrased this option is inconsistent and misleading.
Overall, the most accurate match for combining related terms to broaden the search is OR used to expand the results. The other options either misstate the operator’s function or mislabel the effect on search scope.

To combine related key terms (e.g., free-text, controlled vocabulary), we use the Boolean operator _ to __ our search:单项选择题

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Let's say that you are doing a keyword search in OneSearch to find recent articles about marine pollution. Which ONE of the following groups of search words would bring you the largest number of results? Select the BEST answer.

使用图书馆数据库时，建议您学习这些有助于缩小信息范围的搜索词（AND、OR 和 NOT），图书管理员称之为：

When using Library Databases, it is recommended you learn these search terms that help narrow information, (AND, OR, and NOT), which librarians call this:

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To combine related key terms (e.g., free-text, controlled vocabulary), we use the Boolean operator _________ to __________ our search:单项选择题

类似问题

4. To find articles about AI ethics in universities, which search statement is most effective?

2. Which Boolean operator is used to broaden a search by including either of two keywords?

2. Which Boolean operator is used to broaden a search by including either of two keywords?

2. Which Boolean operator is used to broaden a search by including either of two keywords?

If you are getting too many search results, what can you use to narrow your search?

Let's say that you are doing a keyword search in OneSearch to find recent articles about marine pollution. Which ONE of the following groups of search words would bring you the largest number of results? Select the BEST answer.

使用图书馆数据库时，建议您学习这些有助于缩小信息范围的搜索词（AND、OR 和 NOT），图书管理员称之为：

When using Library Databases, it is recommended you learn these search terms that help narrow information, (AND, OR, and NOT), which librarians call this:

更多留学生实用工具

希望你的学习变得更简单

To combine related key terms (e.g., free-text, controlled vocabulary), we use the Boolean operator _ to __ our search:单项选择题