Listen to Track 43.
Now answer the questions.
What is the main purpose of the lecture?
What does the professor imply about the strength of the first gunpowder made in Europe?
Why does the professor mention the nineteenth-century saying about Colonel Colt?
According to the professor, what was a long-term effect of the introduction of gunpowder to Europe?
According to the professor, why were Taoist monks interested in gunpowder?
Listen to Track 44.
Now answer the question.
What can be inferred about the professor when she says this?