With an area of more than 5,500m2, and a staff of 150, our cooperation factory dedicated to strict quality control and we are always available to provide you with customized services.Follow the times, Change the world! We warmly welcom...
题目为了节能减排,我县天然气公司采用按月分段计费的方法出售天然气.每月购买天然气在50立方米以内(含50立方米),每立方米3.05元;超过50立方米的部分,每立方米3.45元.李阿姨家因冬天用燃气壁挂炉取暖,1月份要购买天然气150立方米.请你算一算,李阿姨购买天然气共需多少钱? 答案解:3.05×50=152.5...