管子退火的目的是提高（）。
A.塑性
B.强度
C.刚度
D.弹性
参考答案：A
______ late, he also forgot his books.
A．Not only he turned up
B．Not only he turned out
C．Not only did he turn out
D．Not only did he turn up
信用社安全保卫工作制度规定营业期间，营业人员必须按时到岗，加强柜面监督，坚持双人上岗。
