单项选择题
A．Men have become less and less polite to women. B．The women are thought of as the weaker sex. C．The women could not open doors for themselves. D．Men' s attitudes towards women are reasonabl
A．Men ought to make gestures of politeness towards women. B．Women ought to make gestures of politeness towards men. C．Women have achieved equality with men. D．Men are beginning to treat women as equal human beings.
A．explosive B．caused by compressed tar C．a pressure disturbance D．shock wave