单项选择题
A．does not disturb existing pressures B．stays behind its disturbance C．does not produce great enough changes in pressure D．stays ahead of its disturbance
A．Because the man should not hold the door open. B．Because they think they are looked down upon. C．Because they are treated too politely. D．Because men often offend women in this manner.
A．size B．structure C．temperament D．appearance