金属材料的剪切强度低，塑性好，组织均匀，缺口敏感性低，则冲裁件成型精度高。
参考答案：对
—Why did he suffer failure again?
—It was his carelessness ________ ________it.
A．which, managed by
B．that, resulted from
C．that, contributed to
D．that, benefited from
匠班银
