汉代时“（江南）不忧冻饿，亦亡（无）千金之家”，至宋代则有“苏湖熟，天下足”的谚语。导致这一变化的最主要原因是

题干

汉代时“（江南）不忧冻饿，亦亡（无）千金之家”，至宋代则有“苏湖熟，天下足”的谚语。导致这一变化的最主要原因是（）

A：北民南迁带来先进技术和劳动力

B：大运河贯通南北

C：各民族之间的长期交往

D：相对安定的社会环境

上一题下一题 0.0难度选择题更新时间:2019-10-05 10:14:08

A

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Classroom Information
Ages	Boys 8th—12th Grade
Skills	All Skill Levels
Days	Sunday (A 10—week Program) Half Day: Morning: 9:00 am—12:00 pm Afternoon:1:00 am—4:00 pm
Sample Schedule	Morning Period: (9:00 am—12:00 pm): Basketball, Volleyball, Floor Hockey Lunch Break: 12:00 pm—1:00 pm (Kids Must Bring Their Own Lunch) Afternoon Period: (1:00 pm—4:00 pm): Basketball, Floor Hockey, Soccer, Relay Races
Costs	Half Day: $ 50 per day Full Day: $ 90 per day