下列哪个钢种为含镍不锈钢()。
A、304
B、409
C、201
参考答案:B
The police were seeking more information to find out ____ the rich merchant.
A.who was it that killed
B.who it was that killed
C.it was who killed
D.who was it killed
违反治安管理行为最本质的特征是( )
A.社会危害性
B.违法性
C.情节轻微性
D.应受处罚性