砌筑六层以下建筑物的保温承重墙，宜选用( )。
A．粉煤灰砌块
B．烧结空心砖
C．烧结多孔砖
D．蒸压灰砂砖
参考答案：C
—You've left the light on.
—Oh.So I have.________and turn it off.
A．I'll go
B．I've gone
C．I go
D．I'm going
飞轮饱和
