23. A B C D on number line, not in the order. AC= 20, CD= 7, AB=3. which of the following can be BD? (1) 30. (2) 10. (3)24.
答案:(1)(2)
(3)从左依次ABCD (因为说NOT IN THE ORDER,所以应该不选这个)means "it does not necessaryly in this order. and it means these four points may follow any order. in my opinion, (3)24 is correct.