扣件式钢管脚手架所用的钢管规格尺寸（）。
A.Φ48x3.5或Φ51x3
B.Φ38x2.5
C.Φ30x1.5
D.Φ62x4
参考答案：A
So loudly____that even people in the next room could hear him.
A．did he speak
B．spoke he
C．he spoke
D．should he speak
变压器的负载能力
