由精整工序责任造成的缺陷有（）。
A.折叠
B.矫直裂纹
C.内部裂纹
D.弯曲
E.耳子
参考答案：B, C, D
.My reaction towards my classmates at the party was so cold and emotionless ____ I had never been interested in them.
A．as
B．that
C．as if
D．as to
交流接触器吸合时，产生较大的噪音是什么原因？
