题目

某同学用柔软棉线测出地图上长江长63.00cm，北京至郑州铁路线长6.95cm。长江实际长度为6300km，则北京至郑州实际铁路长为多少千米？ 答案：【答案】695千米。【解析】根据题意可知：；实际铁路长：。答：北京至郑州实际铁路长为695千米。The library needs __________, but it’ll have to wait until Sunday.A．cleaningB．be cleanedC．cleanD．being cleaned