2. 外语
  3. A, B, and C are points on a line. The distance between A and B is twice the distance between A and C. The distance between C and

A, B, and C are points on a line. The distance between A and B is twice the distance between A and C. The distance between C and

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问题 A, B, and C are points on a line. The distance between A and B is twice the distance between A and C. The distance between C and B is 10.

Column A                                  Column B
The distance between A and B              10
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案D
解析 A、B和C是同一条直线上的点。A与B之间的距离等于A与C之间距离的2倍，C和B之间的距离是10。
解：本题的正确答案是(D)。解答本题的关键是对以下两种情况的把握：(1)C点在A和B的中间，则|AB|=20；(2)A点在B和C的中间，则|AB|=20/3
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