某兴趣小组设计了“探究种子萌发的环境条件”实验(种子萌发的内部条件已具备),实验设计如图:
The students carried their books away from the school ____ ____ .
甲乙两地实际距离5千米,在图上量得两地相距1厘米这幅地图的比例尺是( )