热轧带肋钢筋HRB400E中的“E”是指（）。
A.细晶粒钢筋
B.再生钢筋
C.盘卷状态交货的钢筋
D.抗震结构适用的钢筋
参考答案：D
Chinese GDP has been growing steadily year by year, _________ second in the world now.
A．to rank
B．ranked
C．ranking
D．ranks
