题目内容：
How is the speaker in an academic presentation similar to a tour guide?
A.Both of them need to tell people the “destinations“ in advance to ensure that they feel safe to “follow“.
B.Both of them use louder speakers to make sure that people can hear them.
C.Both of them need to be trained to acquire the necessary skills to be up to the positions.
D.Both of them use “maps“ to make sure that they are going in the right direction.
参考答案：