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| Inspiring Questions from the Sea of Examinations(题海拾贝) | |
| 作者单位： | 陕西师范大学数学与信息科学学院 |
| 摘 要： | 1 There are four cottages on a straight road.The distance between Ted's and Alice's cottages is3 km.Both Bob's and Carol's cottages are twice asfar from Alice's as they are from Ted's.Find thedistance between Bob's and Carol's cottages in kilo-meters,在笔直的公路边有四幢房子,它们分别是 Ted、Alice、Bob 和 Carol 的家.已知 Ted 和 Alice 的家相距3千米,Bob 和 Carol 的家到 Alice 家的距离都是到Ted 家距离的二倍.问 Bob 和 Carol 的家相距多少千米. |
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