Official 49 Lec 1
Question 6 of 6
Why does the professor say this:

A.

He wants some information from the students

B.

He thinks that the students may find an example helpful

C.

He realizes that he forgot to mention an important topic

D.

He wants to point out an important difference between frozen ground and dry ground

正确答案:B

显示答案
进入答题
00:00
00:00
隐藏原文

译文

精听文本