---- Would you like to see the movies with me tonight? It’s said to be a science fiction film.

---    .

A．Thank you very much

B．Yes, I’d love to.

C．No, I don’t think so

D．You’re welcome

当贴现率为15％时，某项目的净现值是340万元；当贴现率为18％时，净现值是－30万元，则其内部收益率是（）。