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gave a two-hour online lecture but didn't realize he was on mute. Professor Wang did not know
in his online lecture, the
on his iPad was switched off. This meant that
of the students in his online
heard what he was talking about. His university switched his classes online to reduce the
of COVID-19. His lecture started
but then his
froze. The
came back but the mic was off. Professor Wang did not notice. One of his students says it might be because the professor used an iPad and not a
.
