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…
Desbloquea todos los exámenes, simulaciones ilimitadas, las 80 fases del juego y mucho más.