题目

_________, they had no chance of winning the war. A. As they fought bravely           B. Bravely though they fought C. Brave as they fought             D. Now that they fought bravely   答案：B16．用下列物质的编号回答有关问题：①雨水  ②蒸馏水  ③雨后洁净的空气  ④四氧化三铁  ⑤氮气  ⑥高锰酸钾分解后的固体产物  ⑦硫在氧气中恰好完全反应的产物  ⑧自来水  ⑨C60+属于混合物的是①③⑥⑧属于纯净物的是②④⑤⑦⑨属于单质的是⑤⑨属于化合物的是②④⑦．