单项选择题

What can we infer from this discussion

A．That Bob does not get along with his lab partner.
B．That the students performed the experiment correctly.
C．That the students had problems, and could not complete the lab experiment.
D．That there was a fire in the lab during the experiment.

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热门试题

单项选择题

The attempt to help blind people to see with sound ________.

A．was similar to the sound location system of the bats
B．led to a product that sent out sound waves of about 20,000 cycles per second
C．was experimented on a submarine
D．turned out to be a failure

单项选择题

How do blind children play soccer

A．They listen to the sound of the ball bouncing.
B．They ask an adult to guide them.
C．They hold a bell in their hands.
D．They put a bell inside the ball.