2. 外语
  3. Patent Patents【T1】______the chances of inventors to make money from【T2】______.【T3】______. During that time, the inventor【T4】

Patent Patents【T1】______the chances of inventors to make money from【T2】______.【T3】______. During that time, the inventor【T4】

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问题     Patent
    Patents【T1】______the chances of inventors to make money from【T2】______.【T3】______. During that time, the inventor【T4】______ to【T5】______. After 20 years,【T6】______ make or sell the invention.
    A patent gives【T7】______time to develop and market a product. Patents also provide a way to share and spread【T8】______
    【T9】______you have an idea for an invention How do you【T10】______? The first step is【T11】______. You must be sure【T12】______. So you must【T13】______ that already have patents. This can be a big job and【T14】______. Many inventors【T15】______.
【T12】
选项
答案no one else has invented a device just like yours
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