一个听力问题

inapUID: 3033165

TPO24套里的第10套第5个听力第28题，让重听了段话，截文如下：
Professor: We call all of this – the land phase of the Phosphorus cycle. But a lot of the Phosphorus in the soil gets washed away into rivers by rain and melting snow.
And so begins another phase of the cycle. Can anyone guess what it is called? Nancy<BR>
Nancy: Well, if the one is called the land phase, then this has to be called the water phase, right?
Professor: Yes, that's such a difficult point isn't it?

问题28. What does the professor mean when she says this  
She realizes that the students are struggling with the concept
She is surprised that the student knew the answer to her question
She thinks that the answer to the question is obvious
She thinks that this phase of the cycle has an unusual name

答案居然是C！！！

非常不理解。

inapUID: 3033165

What does the professor mean when she says this  
this是这句话：Yes, that's such a difficult point isn't it?

inapUID: 3033165

这教授是在讽刺那个学生么···听录音的时候没发现有任何嘲讽的迹象啊！

willtonUID: 3277769

inap 发表于 2012-9-11 11:43
这教授是在讽刺那个学生么···听录音的时候没发现有任何嘲讽的迹象啊！

这个我记得，教授说的时候好像还笑了是不是。再说了，根据这个前后文，也很容易猜到教授是在说反话啊，不是讽刺！