螺纹底径是指与外螺纹或内螺纹牙底相切的假想圆柱或圆锥的直径，即外螺纹小径或内螺纹大径。( )
参考答案：对
继发性皮损（）、溃疡、鳞屑、浸渍、裂隙、瘢痕、萎缩、痂、抓痕、苔藓样变。
All the passengers were _______ wounded in the road accident.
A．more and more
B．by and by
C．more or less
D．little and little
