题目

唐朝诗人皮日休赞颂大运河：“北通涿郡之渔商，南运江都之转输，其为利也博哉！”由此可看出隋朝开凿大运河（） A . 巩固了隋朝的统治 B . 促进贞观之治的局面 C . 促进了南北经济交流 D . 加强了民族融合 答案：CThree hours later, they got to the top of the mountain, _____. [     ]A. tired but excited B. tiredly but excitedly C. tiredly but excited D. tired but excitedly