基础底部扩展宽度(大放腿退台宽度)要受“刚性角”限制的是()。
A、深基础
B、钢筋混凝土基础
C、条形基础
D、砖基础
参考答案:D
将铁丝插入硫酸铜溶液中,能观察到的现象是( )
A.有大量气泡生成
B.溶液有蓝色变成黄色
C.铁丝表面覆盖一层红色物质
D.铁丝表面无变化
To be qualified for the job , _________
A.ir is required that one has profound knowledge
B.profound knowledge is important
C.profound knowledge is a must
D.one needs to have profound knowledge