题目内容：
下列面层混凝土板中，属于目前我国较多采用的是（ ）。
A．普通(素)混凝土板 B．碾压混凝土板
C．预应力混凝土板
D．钢筋混凝土板
参考答案：
答案解析：
单选题：下列面层混凝土板中，属于目前我国较多采用的是（ ）。
- 题目分类：市政公用工程管理与实务
- 题目类型：单选题
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B．碾压混凝土板
C．预应力混凝土板
D．钢筋混凝土板
B．碾压混凝土板
C．预应力混凝土板
D．钢筋混凝土板
They l；vill not start the project until the board chairman__
They l；vill not start the project until the board chairman___________back from S
当栏杆在基坑四周固定时，可采用钢管打人地面（ ）cm深，钢管离基坑边口的距离不应小于50 cm。
当栏杆在基坑四周固定时，可采用钢管打人地面（ ）cm深，钢管离基坑边口的距离不应小于50 cm。A．20～50 B．30～50 C．20～80 D．30～80
简述毒害品的危险特性。
简述毒害品的危险特性。
A)She visited her middle schoo1．C)She was busy workin9．B)She
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A) She was making a phone call.C) She was having a meeting.B
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