题目内容：
防水混凝土施工期间应将地下水位降至防水工程底板垫层（ ）以下。
A．200mm B．300mm
C．500mm
D．600mm
参考答案：
答案解析：
单选题：防水混凝土施工期间应将地下水位降至防水工程底板垫层（ ）以下。
- 题目分类：矿业工程
- 题目类型：单选题
- 查看权限：VIP
B．300mm
C．500mm
D．600mm
B．300mm
C．500mm
D．600mm
The passage is basically a________.
The passage is basically a________.A．biography of John Paul Jones B．criticism of
根据下面内容，回答题： There has been, in history, a man who was swall
根据下面内容，回答题： There has been, in history, a man who was swallowed by a whale and
I wouldn't get so angry if you ________ more work done.
I wouldn't get so angry if you ________ more work done.A．get B．got C．will get D
He was told he could join the army when he ________ old eno
He was told he could join the army when he ________ old enough.A．would be B．sho
How ________ of you to remember my birthday!
How ________ of you to remember my birthday!A．thoughtful B．thoughtfully C．caref