根据下列材料请回答 56~59 题:
第 56 题 This passage probably comes from___.
查看答案
I think it’s going to be a big problem.
Yes,it could be.I wonder___we can do about it.
听下面一段材料,回答 17~20 题。
第 17 题 What should the students bring with them to the exam?
where can we see the Monkey Mountain?
水闸壤土地基人工开挖临近设计高程时,应留出()的保护层暂不开挖。A.0.1mB.0.2mC. 0.3mD. 0.2~0.3m