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crosshead    
n. 小标题,子题,联杆器

小标题,子题,联杆器

crosshead
n 1: a heading of a subsection printed within the body of the
text [synonym: {crossheading}, {crosshead}]
2: metal block that connects to a piston; it slides on parallel
guides and moves a connecting rod back and forth


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  • List of academic databases and search engines - Wikipedia
    FREE Resources: 3 articles every 2 weeks (Register and Read Program, archived journals) Also, early journals (prior to 1923 in US, 1870 elsewhere) free, no registry necessary Free and Subscription JSTOR [89] Jurn: Multidisciplinary Jurn is a free-to-use online search tool for finding and downloading free full-text scholarly works
  • Elsevier - Wikipedia
    For most articles on the website, abstracts are freely available; access to the full text of the article (in PDF, and also HTML for newer publications) often requires a subscription or pay-per-view purchase [37] In 2019, Elsevier published 49,000 free open access articles and 370 full open access journals
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    URL redirection, also called URL forwarding, is a World Wide Web technique for making a web page available under more than one URL address When a web browser attempts to open a URL that has been redirected, a page with a different URL is opened
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    MEDLINE (Medical Literature Analysis and Retrieval System Online, or MEDLARS Online) is a bibliographic database of life sciences and biomedical information It includes bibliographic information for articles from academic journals covering medicine, nursing, pharmacy, dentistry, veterinary medicine, and health care
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    The ID number might be an ISBN for a book, a DOI (digital object identifier) for an article or some e-books, or any of several ID numbers that are specific to particular article databases, such as a PMID number for articles on PubMed It may be possible to format these so that they are automatically activated and become clickable when added to Wikipedia, for example by typing ISBN (or PMID
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    Direct current may be converted into alternating current via an inverter Direct current has many uses, from the charging of batteries to large power supplies for electronic systems, motors, and more Very large quantities of electrical energy provided via direct-current are used in smelting of aluminum and other electrochemical processes
  • Article (grammar) - Wikipedia
    For example, Sentence 1 uses the definite article and thus, expresses a request for a particular book In contrast, Sentence 2 uses an indefinite article and thus, conveys that the speaker would be satisfied with any book Give me the book Give me a book The definite article can also be used in English to indicate a specific class among other





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