We are taught that a business letter should be written in a formal style ______ in a personal one.

A．rather than

B．other than

C．better than

D．less than

国《反分裂国家法》规定：“尽最大的努力，实现和平统一。”实现和平统一的基础是 [     ]

A．坚持互利互补原则

B．坚持一个中国原则

C．坚持中国特色社会主义道路

D．海峡两岸直接实现通航