• 2021-04-14
    Why was the PEP originally invented?
  • To help young entrepreneurs think about their own development

    内容

    • 0

      This passage talks mainly about ________. A: When and how umbrella was invented B: why the umbrella was so popular in Europe C: the development of the umbrella D: the history and use of the umbrella

    • 1

      This passage talks mainly about ______. A: Why the umbrella was so popular in Europe B: When and how the umbrella was invented C: the history and use of umbrella D: the development of the umbrella

    • 2

      This passage talks mainly about() A: why the umbrella was so popular in Europe B: when and how the umbrella was invented C: the history and the use of umbrella D: the development of the umbrella

    • 3

      If computers ______, many problems on space flight could not have been solved. A: had not been invented B: are not invented C: were not invented D: have not invented

    • 4

      57. James watt ____ the steam engine. A: was inventing B: invented C: had invented D: has invented