《战国策》中对战国武器的描述“陆断牛马，水击鹄雁，当敌即斩”这是因为随着经济的发展，青铜兵器得到改进而更锋利。此外，此时还出现了

A．战车

B．水兵

C．铁兵器

D．弓箭

The sense of mistrust is compounded by smaller annoyances that leave the families feeling as though no one in authority cares about them.

A．offset

B．intensified

C．diminished

D．annulled