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？
