2. 职称英语
  3. In 1950 Roberto was four times as old as Juan. In 1955 Roberto was three times a

In 1950 Roberto was four times as old as Juan. In 1955 Roberto was three times a

游客2024-01-12  18
问题 In 1950 Roberto was four times as old as Juan. In 1955 Roberto was three times as old as Juan. How old was Roberto when Juan was born?
选项 A、5
B、10
C、20
D、30
E、40
答案 D
解析
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