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thedj4JC

  • one year ago

The electron microscope was invented in Germany during the 1930's by _____. Anton van Leeuwenhoek Robert Hooke Hans and Zaccharias Janssen Charles Spencer Max Knott and Ernst Ruska Spencer, maybe?

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  1. thedj4jc
    • one year ago
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    @Rushwr I'm really sorry if I annoying you :-/

  2. thedj4jc
    • one year ago
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    It was Knott and Ruska

  3. thedj4jc
    • one year ago
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    It's alright

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