冷轧扭钢筋是以（）级钢筋为母材，经专用机械加工制作而成的高效钢筋。
A.HPB235
B.HBB335
C.HRB400
D.RRB400
参考答案：A
-Would you like to go with us? [ ]
A. I like
B. I would love to
C. I would like
D. I would love to have
一个边长是5cm的正方形，它的周长是（ ） cm，面积是（ ）cm2。
