A-A+
Why does the professor say this:A．To express u
问题详情
Why does the professor say this:
A．To express uncertainty
B．To disagree with the evidence
C．To acknowledge the disappearance
D．To ask for some ideas请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：Listen again to part of the lecture and then answer the following question.
"You see, it's obvious from the fossil records that species exist during a certain geological time period, and then, they disappear, and we have solid evidence for that. But why they disappear is, well, more speculative."
Why does the professor say this:
"But why they disappear is, well, more speculative."
The word "speculative" expresses uncertainty.
