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标签: invention
以下是与 "invention" 标签相关的所有文章。
- Before the invention of paper， what had been used as writing material？
- Which invention was made for navigation?
- The definition of invention is: Invention refers to a new technical solution suitable for practical use that is applied to the s
- There are three types of patents in China: invention patents, utility model patents, and design patents.
- The New Stone Age around 10,000 years ago saw the invention of metal tools and the wheel.
- A patent is a （） for an invention granted by a government to the inventor.
- The computer，（）is a 20th century invention，has created startling technological changes in the way we organize and produce inform
- The history of fast food in America runs parallel to the invention of the car.
- The moon cake is a modern invention; our ancestors never had moon cakes.
- The invention brought him fame ( ) moreover, it brought him money.