Listening · Parte 2
You will hear part of a talk about the invention of the microwave oven. Complete the sentences with a word or short phrase.
The invention of the microwave oven began when a chocolate peanut bar (1) .......... in Percy Spencer's pocket. Spencer had previously invented a method for (2) .......... the tubes used in radar equipment. Spencer's first experiment involved putting (3) .......... near to some radar equipment. In his next…
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