1. (2022高二下·长春月考) 听录音，回答问题。

1. （1） Who is the speaker?

   A . A student. B . A professor. C . A teacher's helper.
3. （2） What is the class mainly about?

   A . Electricity. B . Modern science. C . Science in ancient Greece and Rome.
5. （3） What was calculated correctly by an ancient Greek?

   A . The size of the earth. B . The size of the moon. C . The distance between the moon and the earth.
7. （4） What will the speaker do next?

   A . Talk about Archimedes. B . Explain a math problem. C . Answer some questions.