盘卷钢筋HPB300调直后的断后伸长率应（）。
A.≥15﹪
B.≥14﹪
C.≥21﹪
D.≥13﹪
参考答案：C
如何把握毛 * * 思想的主要内容和历史地位？
—Are they on the wall?
—________. [ ]
A. No, they are
B. Yes, they are
C. Yes, they're not
D. Yes, they aren't
