题目

．I know he's careful with money, ________ calling him “mean” is bound to annoy him.     A.and    B．or  C．so  D．but   答案：D（20分）读某河流水系图，回答下列问题。⑴说明M河水量丰富的原因。（8分）⑵分析M河通航能力及开发利用状况。（12分）