Jack is 15 years old,three times as old as his sister.How old will Jack be when he is twice as old as his sister? DD
A.18
B.26
C.24
D.20
E.30
【考点】数字运算.
【答案】D
【解答】
【点评】
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发布:2024/8/22 1:0:1组卷:1引用:1难度:0.7