适用于钢筋混凝土结构的铝合金门窗固定方式是( )。
A.预埋件连接
B.燕尾铁脚连接
C.金属膨胀螺栓固定
D.射钉固定
参考答案:D
The TV programme on this channel was so____that everyone there felt___.
A.boring, boring
B.bored, boring
C.boring,bored
D.bored,bored
采煤工作面底板突水有哪些规律?