热处理钢筋是由普通热轧中碳合金钢经淬火和回火调质热处理制成具有高强度，高韧性和高粘接力等优点，直径为6～10mm，产品钢筋为直径2m的弹性盘卷，每盘长度为100～120m，热处理钢筋的螺纹外形有带纵肋和（）两种。

A．钢绞线

B．无纵肋

C．强度高

D．钢丝

How can we meet the needs of today without diminishing the capacity of future generations to meet theirsSustainable development implies a broad view of human welfare, a long-term perspective about social development.

Write an essay which should cover：

1) describing the set of drawings below；

2) stating its main idea and

3) giving your comment.